KCET 2022 Biology Questions with Answers Key Solutions

Q1. A series of experiments were conducted by Frederick Griffith in 1928, on transforming principle with

A

Streptococcus pneumoniae

B

Escherichia coli

C

Bacillus thuringiensis

D

Salmonella typhimurium

Q2. The number of codons effective in coding twenty amino acids:

A

20

B

61

C

32

D

64

Solution:

George Gamow in 1954, pointed out the possibility of a three-letter code i.e. triplet codon. This will give 4 x 4 x 4 = 64 codons which are more than enough to code for twenty amino acids. Out of these 64 codons, 3 codons are stop codons. Hence, 61 effective codons are there for the synthesis of twenty amino acids.

Q3. Which aspect forms the basis of DNA finger-printing?

A

The amount of DNA found in samples of blood, saliva and skin.

B

The ratio of purines and pyrimidines present in DNA.

C

The Sequence of DNA present in the ridges and grooves of finger-prints.

D

The Satellite DNA showing high degree of repetition in DNA segments.

Solution:

Variable Number of Tandem Repeat (VNTR) polymorphism is the basis of DNA fingerprinting which are short nucleotide repeats. DNA of each organism has specific sequences called restriction fragments that can be cleaved by restriction endonuclease enzymes to produce fragments of different lengths.

Q4. Identify the most infectious and fatal type of malarial parasite:

A

Plasmodium ovale

B

Plasmodium vivax

C

Plasmodium malariae

D

Plasmodium falciparum

Q5. The type of antibodies produced during the allergic reaction

A

$\operatorname{IgM}$

B

$\operatorname{Ig} A$

C

$\lg E$

D

$\operatorname{IgG}$

Q6. One of the side-effect of the use of anabolic steroids in females

A

Masculinisation

B

Loss of memory

C

Hallucination

D

Cirrhosis of liver

Q7. Which one of the following is a opiate narcotics ?

A

LSD

B

Barbiturates

C

Morphine

D

Amphetamines

Q8. The large holes in 'Swiss - Cheese' are made by a

A

Fungus that releases a lot of gases during metabolic activities

B

Machine

C

Bacterium that produces methane gas

D

Bacterium producing a large amount of $CO _{2}$

Q9. Which vitamin is increased by "LAB' in curd?

A

Vitamin E

B

Vitamin C

C

Vitamin B

D

Vitamin $B_{12}$

Q10. Enzyme which is useful to remove the oily stains in laundry ?

A

Lipase

B

Renin

C

Protease

D

Amylase

Q11. DNA replicates semi conservatively was first shown in :

A

Higher animals

B

Escherichia coli

C

Human cell

D

Plants

Q12. What does the sample of given base sequence represent ?
$5^{\prime}- GAATTC-3'$
$3^{\prime} - CTTAAG-5'$

A

Palindromic sequence

B

Initiator codon at S' end

C

Deletion mutation

D

Completion of replication

Q13. Gel electrophoresis is used for

A

Cutting of DNA into fragments.

B

Construction of recombinant DNA by joining with cloning vectors.

C

Isolation of DNA molecule.

D

Separation of DNA fragments according to their size.

Q14. An antibiotic resistance gene in a vector usually helps in the selection of

A

Non-competent cells

B

Competent cells

C

Transformed cells

D

Non-recombinant cells

Q15. Silencing of specific mRNA in RNAi is by

A

dsDNA

B

SsRNA

C

dsRNA

D

ssDNA

Q16. Cry-IAC effectively controls,

A

Ring worm

B

Cotton bollworms

C

Corn borer

D

Root nematode

Q17. ADA deficiency can be cured by

A

Heart Transplantation

B

Bone-marrow Transplantation

C

Liver Transplantation

D

Kidney Transplantation

Q18. Average natality rate in our village is $25$ , average mortality is $24$ , immigration $2$ and emigration $3$ and the net increase in population is :

A

27

B

0

C

5

D

10 Q19. The term "Molecular Scissors" refers to

A

Tag polymerase

B

Polymerase-I

C

Polymerase-I

D

Restriction enzyme

Q20. The animals which are active during day time :

A

Cresporal

B

Diurnal

C

Auroral

D

Vesporal

Q21. Which of the following statement is incorrect related to biomes?

A

Low temperature and less rainfall is a characteristics of Tundra biomes.

B

Variation in temperature and mean precipitation accounts for the major biomes,

C

More rainfall and low temperature is the characteristics of deserts.

D

High temperature and minimum rainfall help to form grasslands.

Q22. The amount of Photosynthetically active radiation captured by plants is

A

12-20 percent

B

20-30 percent

C

2-10 percent

D

60-70 percent

Q23. The given graph represents

A

Species area relationship

B

Enzyme activity

C

Growth of organisms

D

Population growth

Q24. Cuscuta is an example of

A

Predation

B

Broad Parasitism

C

Endoparasitism

D

Ectoparasitism

Q25. Particulates of ........... size pose greatest risk to human health.

A

Less than $7.5$ micrometers in diameter

B

Less than $2.5$ micrometers in diameter

C

Less than $4.5$ micrometers in diameter

D

Less than $3.5$ micrometers in diameter

Q26. Maintenance of constant internal environment is called as

A

Osmoregulation

B

Metastasis

C

Homeostasis

D

Thermoregulation

Q27. Bovine spongiform encephalopathy is caused by

A

Fungi

B

Viroids

C

Prions

D

Virus

Q28. Phycoerythrin and Floridian starch is found in

A

Red algae

B

Blue - green algae

C

Green algae

D

Brown algae

Q29. Different types of respiratory organs like gills, book gills, book lungs and trachea are present in

A

Annelids

B

Sponges

C

Molluses

D

Arthropods

Q30. Which of the following plant is used to extract Colchicine?

A

Tulip

B

Colchicum

C

Aloe

D

Asparagus

Q31. Rows of S-shaped setae in the body of earthworm are present in all the segments, except

A

the first segment

B

the last segment

C

the first and last segment

D

the first, last and clitellum

Q32. Cell theory was formulated by

A

Schwann and Robert Brown

B

Schleiden and Schwann

C

Robert Hook and Robert Brown

D

Schleiden and Robert Brown

Q33. The type of Polysaccharide present in a cotton fibre

A

Glycogen

B

Starch

C

Insulin

D

Cellulose

Q34. Enzyme involved in crossing over

A

Ligase

B

Recombinase

C

Polymerase

D

Endonuclease

Q35. Kranz anatomy can be seen in

A

Maize

B

Tomato

C

Potato

D

Pea

Q36. Respiratory quotient of glucose is

A

$1 . 0$

B

$0$

C

$0.7$

D

$0.9$

Q37. A person suddenly starts coughing while swallowing food. This coughing would have been due to improper movement of

A

Tongue

B

Epiglottis

C

Diaphragm

D

Neck

Q38. Binomial nomenclature is introduced by

A

John Ray

B

Carolus Linnaeus

C

Lamarck

D

Bentham and Hooker

Q39. Filtration of blood during urine formation takes place in

A

Glomerulus

B

DCT

C

PCT

D

Collecting duct

Q40. Corpus Callosum connects the

A

Spinal cord with the brain

B

Two lobes of cerebellum

C

Two cerebral hemispheres

D

Cerebrum and cerebellum

Q41. Menstrual cycle is exhibited by:

A

Tiger

B

Cow

C

Rat

D

Apes

Q42. An example of dioecious plant :

A

Papaya

B

Cucurbita

C

Coconut

D

Mango

Q43. Stalk of the Stamen is:

A

Peduncle

B

Filament

C

Pedicel

D

Petiole

Q44. The ovule of angiosperm is technically known as :

A

Megaspore

B

Megasporangium

C

Megasporophyll

D

Megaspore mother cell

Q45. Typical mature embryosae of angiosperm is

A

8 nucleated 1 celled structure

B

8 nucleated 8 celled structure

C

8 nucleated 7 celled structure

D

7 nucleated 8 celled structure

Q46. One of the $2000$ years old viable seed, discovered during the archeological excavation at King Herold's near dead sea.

A

Lupin

B

Sunflower

C

Phoenix dactylifera

D

Maize

Q47. The testis are situated outside the abdominal cavity in scortum as it helps to

A

Regulates hormone secretion

B

Store sperm

C

Release sperm

D

Maintain the low temperature

Q48. Identify the odd one from the following :

A

Isthamus

B

Fimbriae

C

Labia minora

D

Infundibulum

Q49. In which month of gestation, the first movements of foetus and appearance of hair on its head is observed?

A

$8^{\text {th }}$ month

B

$1^{\text {st }}$ month

C

$4^{\text {th }}$ month

D

$5^{\text {th }}$ month

Q50. The most abundant type of WBC cells

A

Monocytes

B

Basophils

C

Neutrophils

D

Eosinophils

Q51. Which of the following is correctly matched ?

A

Spores - Sponge

B

Conidia - Hydra

C

Gemmules - Amoeba

D

Bulbil - Agave

Q52. The technique advised by a doctor to overcome the problem of infertility :

A

RTI

B

MTP

C

ART

D

RCH

Q53. Amniocentesis is a process to:

A

Determine the sex of the foetus

B

Determine any disease of heart

C

Know about the disease of brain

D

To grow cell on culture medium

Q54. The first human like being is

A

Homo menthus

B

Homo erectus

C

Homo habilis

D

Homo sapiens

Q55. $XO$ type of sex determination and $XY$ type of sex determination are the examples of

A

Female Homogamety

B

Male Heterogamety

C

Female Heterogamety

D

Male Homogamety

Q56. Example for Non-Mendelian disorder:

A

Cystic fibrosis

B

Haemophilia

C

Down's syndrome

D

Thalassemia

Q57. Gynecomastia is a symptom of

A

Cri-du-chat syndrome

B

Down's syndrome

C

Kline Felter's syndrome

D

Turner's syndrome

Q58. The affected male in the pedigree chart is symbolized by :

A

B

C

D

Q59. The given diagram represents :

A

Mesosome

B

Chromosome

C

Ribosome

D

Nucleosome

Q60. Which of the following hormones is not secreted by human placenta ?

A

$F S H$

B

hCG

C

Relaxin

D

KCET 2022 Biology Questions with Answers Key Solutions

Q1. A series of experiments were conducted by Frederick Griffith in 1928, on transforming principle with

Streptococcus pneumoniae

Escherichia coli

Bacillus thuringiensis

Salmonella typhimurium

Q2. The number of codons effective in coding twenty amino acids:

20

61

32

64

Q3. Which aspect forms the basis of DNA finger-printing?

The amount of DNA found in samples of blood, saliva and skin.

The ratio of purines and pyrimidines present in DNA.

The Sequence of DNA present in the ridges and grooves of finger-prints.

The Satellite DNA showing high degree of repetition in DNA segments.

Variable Number of Tandem Repeat (VNTR) polymorphism is the basis of DNA fingerprinting which are short nucleotide repeats. DNA of each organism has specific sequences called restriction fragments that can be cleaved by restriction endonuclease enzymes to produce fragments of different lengths.

Q4. Identify the most infectious and fatal type of malarial parasite:

Plasmodium ovale

Plasmodium vivax

Plasmodium malariae

Plasmodium falciparum

Q5. The type of antibodies produced during the allergic reaction

$\operatorname{IgM}$

$\operatorname{Ig} A$

$\lg E$

$\operatorname{IgG}$

Q6. One of the side-effect of the use of anabolic steroids in females

Masculinisation

Loss of memory

Hallucination

Cirrhosis of liver

Q7. Which one of the following is a opiate narcotics ?

LSD

Barbiturates

Morphine

Amphetamines

Q8. The large holes in 'Swiss - Cheese' are made by a

Fungus that releases a lot of gases during metabolic activities

Machine

Bacterium that produces methane gas

Bacterium producing a large amount of $CO _{2}$

Q9. Which vitamin is increased by "LAB' in curd?

Vitamin E

Vitamin C

Vitamin B

Vitamin $B_{12}$

Q10. Enzyme which is useful to remove the oily stains in laundry ?

Lipase

Renin

Protease

Amylase

Q11. DNA replicates semi conservatively was first shown in :

Higher animals

Escherichia coli

Human cell

Plants

Q12. What does the sample of given base sequence represent ? $5^{\prime}- GAATTC-3'$ $3^{\prime} - CTTAAG-5'$

Palindromic sequence

Initiator codon at S' end

Deletion mutation

Completion of replication

Q13. Gel electrophoresis is used for

Cutting of DNA into fragments.

Construction of recombinant DNA by joining with cloning vectors.

Isolation of DNA molecule.

Separation of DNA fragments according to their size.

Q14. An antibiotic resistance gene in a vector usually helps in the selection of

Non-competent cells

Competent cells

Transformed cells

Non-recombinant cells

Q15. Silencing of specific mRNA in RNAi is by

dsDNA

SsRNA

dsRNA

ssDNA

Q16. Cry-IAC effectively controls,

Ring worm

Cotton bollworms

Q12. What does the sample of given base sequence represent ?
$5^{\prime}- GAATTC-3'$
$3^{\prime} - CTTAAG-5'$