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Biology (GATE)

Description: Biology PhotosynthesisMorphogenesis & DevelopmentThe Respiratory SystemOrganization of Life MicrobiologyMicrobial Taxonomy and DiversityVitamins and CoenzymesFloweringAnimal Diversity
Number of Questions: 15
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Tags: Biology Photosynthesis Morphogenesis & Development The Respiratory System Organization of Life Microbiology Microbial Taxonomy and Diversity Vitamins and Coenzymes Flowering Animal Diversity
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Which of the following are examples of C4 plants?

  1. Crassula ovata
  2. Zea mays
  3. Saccharum officinarum
  4. Hordeum vulgare
  5. Oryza sativa

  1. Both 1 and 3

  2. Both 1 and 5

  3. Both 2 and 3

  4. Both 2 and 5

  5. Both 3 and 4

Show answer
Correct Option: C
Explanation:

Both Zea mays and Saccharum officinarum are examples of C4 plants.

Which of the following pairs is incorrectly matched?

  1. Emerson and Arnold - Existence of light and dark reactions in photosynthesis

  2. Engelmann - Chloroplasts as the site of photosynthesis

  3. Hatch and Slack - C3 pathway for CO2 fixation

  4. Ruben and Kamen - Oxygen comes from water in photosynthesis

  5. Peter Mitchell - Chemiosmotic hypothesis of ATP synthesis in light reaction

Show answer
Correct Option: C
Explanation:

In 1966, Hatch and Slack reported the C4 pathway for CO2 fixation in certain tropical plants. In 1954, Melvin Calvin traced the path of carbon in photosynthesis and gave the C3 cycle (now known as Calvin cycle).

Identify the false statements.

P. The source of energy for dark reaction is ATP synthesised in light reaction. Q. The reaction centre of PS I is P700. R. PS I participates only in cyclic phosphorylation. S. Dark reaction occurs on the outer surface of thylakoids.

  1. Both P and Q

  2. Both P and S

  3. Both Q and R

  4. Both R and S

  5. Both Q and S

Show answer
Correct Option: D
Explanation:

Dark reaction occurs in stroma of chloroplast. Statement Q is true, but statement S is false.

Identify the mismatched pairs.

  1. Clostridium - Petritrichous
  2. Nitrosomonas - Monotrichous
  3. Pseudomonas - Amphitrichous
  4. Spirillum - Lophotrichous

  1. Both 1 and 2

  2. Both 1 and 4

  3. Both 2 and 3

  4. Both 2 and 4

  5. Both 3 and 4

Show answer
Correct Option: C
Explanation:

Lophotrichous: Group of flagella at one end, e.g. Spirillum Amphitrichous: Flagella at both sides or ends, e.g. Nitrosomonas

Which of the following are underground modifications of stem?

  1. Potato
  2. Sweet potato
  3. Carrot
  4. Ginger

  1. Both 1 and 2

  2. Both 1 and 4

  3. Both 2 and 3

  4. Both 2 and 4

  5. Both 3 and 4

Show answer
Correct Option: B
Explanation:

Both potato and ginger are underground modifications of stem.

Match the following:

 
Column – I
Column – II
A. Cucumber 1. Aggregate fruit
B.Orange 2. Hesperidium fruit
C. Raspberry 3. Accessory fruit
D. Strawberry 4. Pepo fruit

  1. A - 1, B - 2, C - 3, D - 4

  2. A - 4, B - 3, C - 2, D - 1

  3. A - 1, B - 3, C - 2, D - 4

  4. A - 4, B - 2, C - 1, D - 3

  5. A - 4, B - 2, C - 3, D - 1

Show answer
Correct Option: D
Explanation:

Cucumber is an example of pepo fruit. Orange is an example of hesperidium fruit. Raspberry is an example of aggregate fruit. Strawberry is an example of accessory fruit.

Identify the mismatched pair.

  1. Beriberi - Vitamin B1

  2. Cheilosis - Vitamin B2

  3. Pellagra - Vitamin B3

  4. Pernicious anaemia - Vitamin B6

  5. Scurvy - Vitamin C

Show answer
Correct Option: D
Explanation:

Pernicious anaemia is caused when the body does not make enough red blood cells due to lack of cyanocobalamin (vitamin B12).

Match the following:

 
Column – I
Column – II
A. Vital Capacity 1. TV+IRV
B. Inspiratory Capacity 2. TV+IRV+ERV
C. Functional Residual Capacity 3. TV+IRV+ERV+RV
D. Total Lung Capacity 4. RV+ERV

  1. A - 4, B - 3, C - 2, D - 1

  2. A - 2, B - 1, C - 4, D - 3

  3. A - 2, B - 1, C - 3, D - 4

  4. A - 3, B - 2, C - 4, D - 1

  5. A - 1, B - 2, C - 3, D - 4

Show answer
Correct Option: B
Explanation:

TLC = VC + RV or TLC = TL + IRV + ERV + RV

Flowers are actinomorphic in

  1. mustard, datura and chilli

  2. pea, gulmohur and bean

  3. mustard, gulmohur and bean

  4. pea, datura and chilli

  5. pea, chilli and mustard

Show answer
Correct Option: A
Explanation:

When a flower can be divided into two equal radial halves in any radial plane passing through the centre, it is said to be actinomorphic (radial symmetry), e.g. mustard, datura, chilli.

Parietal placentation is found in

  1. tomato and lemon

  2. dianthus and primrose

  3. mustard and prgemone

  4. sunflower and marigold

  5. pea and china rose

Show answer
Correct Option: C
Explanation:

In parietal placentation, the ovules develop on the inner wall of the ovary.

Match the following:

 
Column - I Column - II
P. Stearic acid 1. Unsaturated fatty acid
Q. Aspartic acid 2. Acidic amino acid
R. Phenylalanine 3. Aromatic amino acid
S. Palmitoleic acid 4. Saturated fatty acid

  1. P - 1; Q - 2; R - 3; S - 4

  2. P - 1; Q - 3; R - 2; S - 4

  3. P - 2; Q - 1; R - 4; S - 3

  4. P - 3; Q - 2; R - 1; S - 4

  5. P - 4; Q - 2; R - 3; S - 1

Show answer
Correct Option: E
Explanation:

Stearic acid is a saturated fatty acid with 18-carbon chain. Aspartic acid is an acidic amino acid. Tyrosine is an aromatic amino acid. Palmitoleic acid is an omega-7 monounsaturated fatty acid.

Match the following:

 
Column – I
Column – II
P. Valvate 1. Cassia
Q. Twisted 2. Pea
R. Imbricate 3. Calotropis
S. Vexillary 4. Cotton

  1. P - 1; Q - 2; R - 3; S - 4

  2. P - 2; Q - 1; R - 4; S - 3

  3. P - 3; Q - 2; R - 1; S - 4

  4. P - 3; Q - 4; R - 1; S - 2

  5. P - 4; Q - 3; R - 2; S - 1

Show answer
Correct Option: D
Explanation:

-

Match the following:

 
Column – I
Column – II
A. Actinomycin 1. Streptomyces rimosus
B. Tetramycin 2. Streptomyces antibioticus
C. Dextran 3. Corynebacterium glutamicum
D. Lysine 4. Leuconostoc mesenteroides

  1. A - 1, B - 2, C - 3, D - 4

  2. A - 2, B - 1, C - 3, D - 4

  3. A - 2, B - 1, C - 4, D - 3

  4. A - 3, B - 2, C - 4, D - 1

  5. A - 4, B - 3, C - 2, D - 1

Show answer
Correct Option: C
Explanation:

Actinomycin is obtained from Streptomyces antibioticus. Tetramycin is obtained from Streptomyces rimosus. Bacterium Leuconostoc mesenteroides produces dextran when it grows on sucrose. Lysine is a product of bacterium Corynebacterium glutamicum.

Match the following:

 
Column – I Column – II
A. Platyhelminthes 1. Flame cells
B. Ctenophora 2. Nephridia
C. Annelida 3. Comb plates
D. Coelentrata 4. Cnidoblasts

  1. A - 1; B - 2; C - 3; D - 4

  2. A - 1; B - 3; C - 2; D - 4

  3. A - 2; B - 3; C - 4; D - 1

  4. A - 3; B - 1; C - 4; D - 2

  5. A - 3; B - 2; C - 4; D - 1

Show answer
Correct Option: B
Explanation:

Flame cells are found in freshwater invertebrates, such as flatworms. Comb plates are locomotor organs found in ctenophora. Nephridia acts as extretory organ in annelids. A cnidoblast is a cell in the epidermis of coelenterates in which a nematocyst is developed.

Assertion (A): In pernicious anaemia, the size of RBC decreases, but their number increases in blood. Reason (R): It is caused due to deficiency of vitamin B12.

Directions: In the following question, there are two statements: Assertion (A) and Reason (R). Consider both the statements independently and mark your answer as

1. if A and R both are correct and R is correct explanation of A
2. if A and R both are correct and R is not correct explanation of A
3. if A is correct and R is incorrect 
4. if A is incorrect and R is correct 
5. if A and R both are incorrect

  1. 1

  2. 2

  3. 3

  4. 4

  5. 5

Show answer
Correct Option: C
Explanation:

Correct answer

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