NEET 2022 Zoology Biology Questions with Answers Key Solutions

Q1. Under normal physiological conditions in human being every $100 \,ml$ of oxygenated blood can deliver ___$ml$ of $O _{2}$ to the tissues.

A

$10 \,ml$

B

$2\, ml$

C

$5 \,ml$

D

$4 \,ml$

Q2. Nitrogenous waste is excreted in the form of pellet or paste by:

A

Pavo

B

Ornithorhynchus

C

Salamandra

D

Hippocampus

Q3. Which of the following is present between the adjacent bones of the vertebral column?

A

Smooth muscle

B

Intercalated discs

C

Cartilage

D

Areolar tissue

Q4. In-situ conservation refers to :

A

Conserve only extinct species

B

Protect and conserve the whole ecosystem

C

Conserve only high risk species

D

Conserve only endangered species

Q5. Given below are two statements:
Statement I: Autoimmune disorder is a condition where body defense mechanism recognizes its own cells as foreign bodies.
Statement II : Rheumatoid arthritis is a condition where body does not attack self cells.
In the light of the above statements, choose the most appropriate answer from the options given below :

A

Statement I is incorrect but Statement II is correct

B

Both Statement I and Statement II are correct

C

Both Statement I and Statement II are incorrect

D

Statement I is correct but Statement II is incorrect

Q6. Which of the following is not the function of conducting part of respiratory system?

A

Provides surface for diffusion of $O _{2}$ and $CO _{2}$

B

It clears inhaled air from foreign particles

C

Inhaled air is humidified

D

Temperature of inhaled air is brought to body temperature

Q7. Given below are two statements:
Statement I : The coagulum is formed of network of threads called thrombins.
Statement II : Spleen is the graveyard of erythrocytes.
In the light of the above statements, choose the most appropriate answer from the options given below:

A

Statement I is incorrect but Statement II is correct

B

Both Statement I and Statement II are correct

C

Both Statement I and Statement II are incorrect

D

Statement I is correct but Statement II is incorrect

Q8. Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): All vertebrates are chordates but all chordates are not vertebrates.
Reason (R) Notochord is replaced by vertebral column in the adult vertebrates.
In the light of the above statements, choose the most appropriate answer from the options given below:

A

(A) is not correct but (R) is correct

B

Both (A) and (R) are correct and (R) is the correct explanation of (A)

C

Both (A) and (R) are correct but (R) is not the correct explanation of (A)

D

(A) is correct but (R) is not correct

Q9. Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Osteoporosis is characterised by decreased bone mass and increased chances of fractures.
Reason (R): Common cause of osteoporosis is increased levels of estrogen.
In the light of the above statements, choose the most appropriate answer from the options given below :

A

(A) is not correct but (R) is correct

B

Both (A) and (R) are correct and (R) is the correct explanation of (A)

C

Both (A) and (R) are correct but (R) is not the correct explanation of $( A )$

D

(A) is correct but (R) is not correct

Q10. Given below are two statements :
Statement I: Mycoplasma can pass through less than $1$ micron filter size.
Statement II : Mycoplasma are bacteria with cell wall In the light of the above statements, choose the most appropriate answer from the options given below :

A

Statement I is incorrect but Statement II is correct

B

Both Statement I and Statement II are correct

C

Both Statement I and Statement II are incorrect

D

Statement I is correct but Statement II is incorrect

Q11. A dehydration reaction links two glucose molecules to produce maltose. If the formula for glucose is $C _{6} H _{12} O _{6}$ then what is the formula for maltose?

A

$C _{12} H _{24} O _{11}$

B

$C _{12} H _{20} O _{10}$

C

$C _{12} H _{24} O _{12}$

D

$C _{12} H _{22} O _{11}$

Q12. Regarding Meiosis, which of the statements is incorrect?

A

Four haploid cells are formed at the end of Meiosis-II

B

There are two stages in Meiosis, Meiosis-I and II

C

DNA replication occurs in $S$ phase of Meiosis-II

D

Pairing of homologous chromosomes and recombination occurs in Meiosis-I

Q13. Natural selection where more individuals acquire specific character value other than the mean character value, leads to:

A

Random change

B

Stabilising change

C

Directional change

D

Disruptive change

Q14. In gene therapy of Adenosine Deaminase (ADA) deficiency, the patient requires periodic infusion of genetically engineered lymphocytes because:

A

Genetically engineered lymphocytes are not immortal cells.

B

Retroviral vector is introduced into these lymphocytes.

C

Gene isolated from marrow cells producing ADA is introduced into cells at embryonic stages

D

Lymphocytes from patient's blood are grown in culture, outside the body.

Q15. If ' $8 $ ' Drosophila in a laboratory population of ' $80$' died during a week, the death rate in the population is ___individuals per Drosophila per week.

A

zero

B

0.1

C

10

D

1.0 Q16. In the taxonomic categories which hierarchial arrangement in ascending order is correct in case of animals ?

A

Kingdom, Order, Phylum, Class, Family, Genus, Species

B

Kingdom, Phylum, Class, Order, Family, Genus, Species

C

Kingdom, Class, Phylum, Family, Order, Genus, Species

D

Kingdom, Order, Class, Phylum, Family, Genus, Species

Solution:

* Provided options are in descending order, not in ascending order.

Q17. Given below are two statements :
Statement I: Restriction endonucleases recognise specific sequence to cut DNA known as palindromic nucleotide sequence.
Statement II : Restriction endonucleases cut the DNA strand a little away from the centre of the palindromic site.
In the light of the above statements, choose the most appropriate answer from the options given below:

A

Statement I is incorrect but Statement II is correct

B

Both Statement I and Statement II are correct

C

Both Statement I and Statement II are incorrect

D

Statement I is correct but Statement II is incorrect

Q18. Breeding crops with higher levels of vitamins and minerals or higher proteins and healthier fats is called :

A

Bio-accumulation

B

Bio-magnification

C

Bio-remediation

D

Bio-fortification

Q19. Identify the microorganism which is responsible for the production of an immunosuppressive molecule cyclosporin A:

A

Streptococcus cerevisiae

B

Trichoderma polysporum

C

Clostridium butylicum

D

Aspergillus niger

Q20. Which of the following is a correct match for disease and its symptoms?

A

Muscular dystrophy - An auto immune disorder causing progressive degeneration of skeletal muscle

B

Arthritis - Inflammed joints

C

Tetany - high $Ca ^{2+}$ level causing rapid spasms.

D

Myasthenia gravis - Genetic disorder resulting in weakening and paralysis of skeletal muscle

Q21. Which of the following statements with respect to Endoplasmic Reticulum is incorrect?

A

SER are the sites for lipid synthesis

B

RER has ribosomes attached to ER

C

SER is devoid of ribosomes

D

In prokaryotes only RER are present

Q22. Given below are two statements:
Statement I : The release of sperms into the seminiferous tubules is called spermiation.
Statement II : Spermiogenesis is the process of formation of sperms from spermatogonia.
In the light of the above statements, choose the most appropriate answer from the options given below :

A

Statement I is incorrect but Statement II is correct

B

Both Statement I and Statement II are correct

C

Both Statement I and Statement II are incorrect

D

Statement I is correct but Statement II is incorrect

Q23. Identify the asexual reproductive structure associated with Penicillium:

A

Buds

B

Zoospores

C

Conidica

D

Gemmules

Q24. In an E.coli strain $i$ gene gets mutated and its product can not bind the inducer molecule. If growth medium is provided with lactose, what will be the outcome?

A

RNA polymerase will bind the promoter region

B

Only $z$ gene will get transcribed

C

$z, y, a$ genes will be transcribed

D

$z, y, a$ genes will not be translated

Q25. Tegmina in cockroach, arises from :

A

Prothorax and Mesothorax

B

Prothorax

C

Mesothorax

D

Metathorax

Q26. In which of the following animals, digestive tract has additional chambers like crop and gizzard ?

A

Pavo, Psittacula, Corvus

B

Corvus, Columba, Chameleon

C

Bufo, Balaenoptera, Bangarus

D

Catla, Columba, Crocodilus

Q27. Which of the following statements are true for spermatogenesis but do not hold true for Oogenesis ?
(a) It results in the formation of haploid gametes
(b) Differentiation of gamete occurs after the completion of meiosis
(c) Meiosis occurs continuously in a mitotically dividing stem cell population
(d) It is controlled by the Luteinising hormone (LH) and Follicle Stimulating Hormone (FSH) secreted by the anterior pituitary
(e) It is initiated at puberty
Choose the most appropriate answer from the options given below:

A

(b), (c) and (e) only

B

(c) and (e) only

C

(b) and (c) only

D

(b), (d) and (e) only

Q28. Given below are two statements :
Statement I: Fatty acids and glycerols cannot be absorbed into the blood.
Statement II: Specialized lymphatic capillaries called lacteals carry chylomicrons into lymphatic vessels and ultimately into the blood.
In the light of the above statements, choose the most appropriate answer from the options given below:

A

Statement I is incorrect but Statement II is correct

B

Both Statement I and Statement II are correct

C

Both Statement I and Statement II are incorrect

D

Statement I is correct but Statement II is incorrect

Q29. Lippe's loop is a type of contraceptive used as :

A

Copper releasing IUD

B

Cervical barrier

C

Vault barrier

D

Non-Medicated IUD

Q30. Which of the following functions is not performed by secretions from salivary glands?

A

Digestion of disaccharides

B

Control bacterial population in mouth

C

Digestion of complex carbohydrates

D

Lubrication of oral cavity

Q31. Which of the following is not a connective tissue?

A

Neuroglia

B

Blood

C

Adipose tissue

D

Cartilage

Q32. Detritivores breakdown detritus into smaller particles. This process is called:

A

Decomposition

B

Catabolism

C

Fragmentation

D

Humification

Q33. Select the incorrect statement with reference to mitosis :

A

Splitting of centromere occurs at anaphase.

B

All the chromosomes lie at the equator at metaphase.

C

Spindle fibres attach to centromere of chromosomes.

D

Chromosomes decondense at telophase.

Q34. If the length of a DNA molecule is $1.1$ metres, what will be the approximate number of base pairs?

A

$6.6 \times 10^{6} \,bp$

B

$3.3 \times 10^{9}\, bp$

C

$6.6 \times 10^{9}\, bp$

D

$3.3 \times 10^{6}\, bp$

Q35. At which stage of life the oogenesis process is initiated?

A

Adult

B

Puberty

C

Embryonic development stage

D

Birth

Q36. Which of the following is not a desirable feature of a cloning vector?

A

Presence of two or more recognition sites

B

Presence of origin of replication

C

Presence of a marker gene

D

Presence of single restriction enzyme site

Q37. Select the incorrect statement regarding synapses:

A

Impulse transmission across a chemical synapse is always faster than that across an electrical synapse.

B

The membranes of presynaptic and postsynaptic neurons are in close proximity in an electrical synapse.

C

Electrical current can flow directly from one neuron into the other across the electrical synapse.

D

Chemical synapses use neurotransmitters

Q38. Statements related to human Insulin are given below. Which statement(s) is/are correct about genetically engineered Insulin ?
(a) Pro-hormone insulin contain extra stretch of C-peptide
(b) A-peptide and B-peptide chains of insulin were produced separately in E.coli, extracted and combined by creating disulphide bond between them.
(c) Insulin used for treating Diabetes was extracted from Cattles and Pigs.
(d) Pro-hormone Insulin needs to be processed for converting into a mature and functional hormone.
(e) Some patients develop allergic reactions to the foreign insulin.
Choose the most appropriate answer from the options given below:

A

(c), (d) and (e) only

B

(a), (b) and (d) only

C

(b) only

D

(c) and (d) only

Q39. Which of the following are not the effects of Parathyroid hormone?
(a) Stimulates the process of bone resorption
(b) Decreases $Ca ^{2+}$ level in blood
(c) Reabsorption of $Ca ^{2+}$ by renal tubules
(d) Decreases the absorption of $Ca ^{2+}$ from digested food
(e) Increases metabolism of carbohydrates
Choose the most appropriate answer from the options given below:

A

(b) and (c) only

B

(a) and (c) only

C

(b), (d) and (e) only

D

(a) and (e) only

Q40. Which of the following statements is not true?

A

Flippers of penguins and dolphins are a pair of homologous organs

B

Analogous structures are a resùlt of convergent evolution

C

Sweet potato and potato is an example of analogy

D

Homology indicates common ancestry

Q41. Which one of the following statements is correct?

A

Increased ventricular pressure causes closing of the semilunar valves.

B

The atrio-ventricular node(AVN) generates an action potential to stimulate atrial contraction

C

The tricuspid and the bicuspid valves open due to the pressure exerted by the simultaneous contraction of the atria

D

Blood moves freely from atrium to the ventricle during joint diastole.

Q42. Match List - I with List - II.

List I (Biological Molecules) List II (Biological functions)

a Glycogen i Hormone

b Globulin ii Biocatalyst

c Steroids iii Antibody

d Thrombin iv Storage product

Choose the correct answer from the options given below:

List I (Biological Molecules)	List II (Biological functions)
a	Glycogen	i	Hormone
b	Globulin	ii	Biocatalyst
c	Steroids	iii	Antibody
d	Thrombin	iv	Storage product

A

(a) - (iv), (b) - (iii), (c) - (i), (d) - (ii)

B

(a) - (iii), (b) - (ii), (c) - (iv), (d) - (i)

C

(a) - (iv), (b) - (ii), (c) - (i), (d) - (iii)

D

(a) - (ii), (b) - (iv), (c) - (iii), (d) - (i)

Q43. Select the incorrect statement with respect to acquired immunity.

A

Acquired immunity is non-specific type of defense present at the time of birth.

B

Primary response is produced when our body encounters a pathogen for the first time.

C

Anamnestic response is elicited on subsequent encounters with the same pathogen.

D

Anamnestic response is due to memory of first encounter.

Q44. Ten E.coli cells with ${ }^{15} N - dsDNA$ are incubated in medium containing ${ }^{14} N$ nucleotide. After $60$ minutes, how many E.coli cells will have DNA totally free from $^{15}N$ ?

A

80 cells

B

20 cells

C

40 cells

D

60 cells

Q45. Which of the following is a correct statement?

A

Mycoplasma have DNA, Ribosome and cell wall

B

Cyanobacteria are a group of autotrophic organisms classified under Kingdom Monera.

C

Bacteria are exclusively heterotrophic organisms.

D

Slime moulds are saprophytic organisms classified under Kingdom Monera.

Q46. The recombination frequency between the genes a $\, \& \,c$ is $5 \%, b \,\&\, c$ is $15 \%, b \,\&\, d$ is $9 \%, a \,\&\, b$ is $20 \%, c\, \&\, d$ is $24 \%$ and $a \,\&\, d$ is $29 \%$. What will be the sequence of these genes on a linear chromosome?

A

a, c, b, d

B

a, d, b, c

C

d, b, a, c

D

a, b, c, d

Q47. Match List - I with List - II with respect to methods of Contraception and their respective actions.

List I List II

a Diaphragms i Inhibit ovulation and Implantation

b Contraceptive Pills ii Increase phagocytosis of sperm within Uterus

c Intra Uterine Devices iii Absence of Menstrual cycle Devices and ovulation following parturition

d Lactational Amenorrhea iv They cover the cervix blocking the entry of sperms

Choose the correct answer from the options given below:

List I	List II
a	Diaphragms	i	Inhibit ovulation and Implantation
b	Contraceptive Pills	ii	Increase phagocytosis of sperm within Uterus
c	Intra Uterine Devices	iii	Absence of Menstrual cycle Devices and ovulation following parturition
d	Lactational Amenorrhea	iv	They cover the cervix blocking the entry of sperms

A

(a) - (iii), (b) - (ii), (c) - (i), (d) - (iv)

B

(a) - (iv), (b) - (iii), (c) - (i), (d) - (ii)

C

(a) - (iv), (b) - (i), (c) - (ii), (d) - (iii)

D

(a) - (ii), (b) - (iv), (c) - (i), (d) - (iii)

Q48. Match List - I with List - II.

List I List II

a Bronchioles i Dense Regular Connective Tissue

b Goblet cell ii Loose Connective Tissue

c Tendons iii Glandular Tissue

d Adipose Tissue iv Ciliated Epithelium

Choose the correct answer from the options given below:

List I	List II
a	Bronchioles	i	Dense Regular Connective Tissue
b	Goblet cell	ii	Loose Connective Tissue
c	Tendons	iii	Glandular Tissue
d	Adipose Tissue	iv	Ciliated Epithelium

A

(a) - (iii), (b) - (iv), (c) - (ii), (d) - (i)

B

(a) - (iv), (b) - (iii), (c) - (i), (d) - (ii)

C

(a) - (i), (b) - (ii), (c) - (iii), (d) - (iv)

D

(a) - (ii), (b) - (i), (c) - (iv), (d) - (iii)

Q49. If a colour blind female marries a man whose mother was also colour blind, what are the chances of her progeny having colour blindness ?

A

$100 \%$

B

$25 \%$

C

$50 \%$

D

$75 \%$

Solution:

Mother - Colourblind $\left(X^C X^C\right)$ Father - Colourblind $\left(X^C Y\right.$ ) (A male progeny receives $X$ chromosome from the mother. Since mother is colourblind, son is also colourblind). $X^C X^C-X^C X^C-X^C Y-X^C Y-F 1$ Generation $100 \%$ progeny will be colour blind.

Q50. Given below are two statements :
Statement I : In a scrubber the exhaust from the thermal plant is passed through the electric wires to charge the dust particles.
Statement II: Particulate matter (PM 2.5) can not be removed by scrubber but can be removed by an electrostatic precipitator.
In the light of the above statements, choose the most appropriate answer from the options given below:

A

Statement I is incorrect but Statement II is correct

B

Both Statement I and Statement II are correct

C

Both Statement I and Statement II are incorrect

D

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NEET 2022 Zoology Biology Questions with Answers Key Solutions

Q1. Under normal physiological conditions in human being every $100 \,ml$ of oxygenated blood can deliver ___$ml$ of $O _{2}$ to the tissues.

$10 \,ml$

$2\, ml$

$5 \,ml$

$4 \,ml$

Q2. Nitrogenous waste is excreted in the form of pellet or paste by:

Pavo

Ornithorhynchus

Salamandra

Hippocampus

Q3. Which of the following is present between the adjacent bones of the vertebral column?

Smooth muscle

Intercalated discs

Cartilage

Areolar tissue

Q4. In-situ conservation refers to :

Conserve only extinct species

Protect and conserve the whole ecosystem

Conserve only high risk species

Conserve only endangered species

Statement I is incorrect but Statement II is correct

Both Statement I and Statement II are correct

Both Statement I and Statement II are incorrect

Statement I is correct but Statement II is incorrect

Q6. Which of the following is not the function of conducting part of respiratory system?

Provides surface for diffusion of $O _{2}$ and $CO _{2}$

It clears inhaled air from foreign particles

Inhaled air is humidified

Temperature of inhaled air is brought to body temperature

Q7. Given below are two statements: Statement I : The coagulum is formed of network of threads called thrombins. Statement II : Spleen is the graveyard of erythrocytes. In the light of the above statements, choose the most appropriate answer from the options given below:

Statement I is incorrect but Statement II is correct

Both Statement I and Statement II are correct

Both Statement I and Statement II are incorrect

Statement I is correct but Statement II is incorrect

(A) is not correct but (R) is correct

Both (A) and (R) are correct and (R) is the correct explanation of (A)

Both (A) and (R) are correct but (R) is not the correct explanation of (A)

(A) is correct but (R) is not correct

(A) is not correct but (R) is correct

Both (A) and (R) are correct and (R) is the correct explanation of (A)

Both (A) and (R) are correct but (R) is not the correct explanation of $( A )$

(A) is correct but (R) is not correct

Q10. Given below are two statements : Statement I: Mycoplasma can pass through less than $1$ micron filter size. Statement II : Mycoplasma are bacteria with cell wall In the light of the above statements, choose the most appropriate answer from the options given below :

Statement I is incorrect but Statement II is correct

Both Statement I and Statement II are correct

Both Statement I and Statement II are incorrect

Statement I is correct but Statement II is incorrect

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Q11. A dehydration reaction links two glucose molecules to produce maltose. If the formula for glucose is $C _{6} H _{12} O _{6}$ then what is the formula for maltose?

$C _{12} H _{24} O _{11}$

$C _{12} H _{20} O _{10}$

$C _{12} H _{24} O _{12}$

$C _{12} H _{22} O _{11}$

Q12. Regarding Meiosis, which of the statements is incorrect?

Four haploid cells are formed at the end of Meiosis-II

There are two stages in Meiosis, Meiosis-I and II

DNA replication occurs in $S$ phase of Meiosis-II

Pairing of homologous chromosomes and recombination occurs in Meiosis-I

Q13. Natural selection where more individuals acquire specific character value other than the mean character value, leads to:

Random change

Stabilising change

Directional change

Disruptive change

Q14. In gene therapy of Adenosine Deaminase (ADA) deficiency, the patient requires periodic infusion of genetically engineered lymphocytes because:

Genetically engineered lymphocytes are not immortal cells.

Retroviral vector is introduced into these lymphocytes.

Gene isolated from marrow cells producing ADA is introduced into cells at embryonic stages

Lymphocytes from patient's blood are grown in culture, outside the body.

Q15. If ' $8 $ ' Drosophila in a laboratory population of ' $80$' died during a week, the death rate in the population is ___individuals per Drosophila per week.

zero

0.1

10

1.0

Q16. In the taxonomic categories which hierarchial arrangement in ascending order is correct in case of animals ?

Kingdom, Order, Phylum, Class, Family, Genus, Species

Kingdom, Phylum, Class, Order, Family, Genus, Species

Kingdom, Class, Phylum, Family, Order, Genus, Species

Kingdom, Order, Class, Phylum, Family, Genus, Species

Q7. Given below are two statements:
Statement I : The coagulum is formed of network of threads called thrombins.
Statement II : Spleen is the graveyard of erythrocytes.
In the light of the above statements, choose the most appropriate answer from the options given below:

Q10. Given below are two statements :
Statement I: Mycoplasma can pass through less than $1$ micron filter size.
Statement II : Mycoplasma are bacteria with cell wall In the light of the above statements, choose the most appropriate answer from the options given below :