Biochemistry in Biotechnology MCQ Questions & Answers

21.
Match items in Group I with Group II.

Group I Group II

P. Glycolytic pathway 1. Chloroplast

Q. Eukaryotic oxidative metabolism 2. Glyoxysomes

R. Glyoxylate cycle 3. Mitochondria

S. Calvin cycle 4. Cytosol

A. P-1, Q-2, R-3, S-4

B. P-2, Q-3, R-4, S-1

C. P-4, Q-3, R-2, S-1

D. P-3, Q-4, R-1, S-2

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22.
The value of ΔG°, if given K_ep is 1.7, at 23°C will be

A. -17.19 kJ mol^-1

B. -19.8 kJ mol^-1

C. +52.82 kJ mol^-1

D. -117.07 kJ mol^-1

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23.
Oxidation reduction reactions with positive standard redox potential (ΔE°) have

A. Positive ΔG°

B. Negative ΔG°

C. Positive ΔE⁺

D. Negative ΔE⁺

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24.
Identify the enzyme that catalyzes the following reaction.
$$\alpha {\text{ - Ketoglutarate}} + NADH + NH_4^ + + {H^ + } \to {\text{Glutamate}} + NA{D^ + } + {H_2}O$$

A. Glutamate synthetase

B. Glutamate oxoglutarate aminotransferase

C. Glutamate dehydrogenase

D. α-Ketoglutarate deaminase

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25.
Match the following photoreceptors with their prosthetic groups and spectral specificity

Photoreceptor Moiety that absorbs light Absorption (nm)

P. Phototropin 1. Chromobilin a. 400 - 500

Q. Cryptochrome 2. FAD b. 600 - 800

R. Phytochrome 3. FMN c. 500 - 600

A. P-3-a, Q-2-a, R-1-b

B. P-1-b, Q-1-a, R-3-b

C. P-3-a, Q-1-a, R-1-c

D. P-2-c, Q-1-c, R-1-a

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26.
The degree of inhibition for an enzyme catalyzed reaction at a particular inhibitor concentration is independent of initial substrate concentration. The inhibition follows

A. Competitive inhibition

B. Mixed inhibition

C. Uncompetitive inhibition

D. Non-competitive inhibition

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27.
Which one of the following amino acid residues will destabilize an α-helix when inserted in the middle of the helix?

A. Pro

B. Val

C. Ile

D. Leu

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28.
Determine the correctness or otherwise of the following Assertion (A) and Reason (R).
Assertion: Plants convert fatty acids into glucose.
Reason: Plants have peroxisomes.

A. Both (A) and (R) are true but (R) is not the correct reason for (A)

B. Both (A) and (R) are true and (R) is the correct reason for (A)

C. (A) is true but (R) is false

D. (A) is false but (R) is true

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29.
The turnover numbers for the enzymes E1 and E2 are 150 s^-1 and 15 s^-1 respectively. This means

A. E1 binds to its substrate with higher affinity than E2

B. The velocity of reactions catalyzed by E1 and E2 at their respective saturating substrate concentrations could be equal, if concentration of E2 used is 10 times that of E1

C. The velocity of E1 catalyzed reaction is always greater than that of E2

D. The velocity of E1 catalyzed reaction at a particular enzyme concentration and saturating substrate concentration is lower than that of E2 catalyzed reaction under the same conditions

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30.
Match the chemicals in Group I with the possible type/class in Group II.

Group I Group II

P. Picloram 1. Vitamin

Q. Zeatin 2. Auxin

R. Thiamine 3. Amino Acid

S. Glutamine 4. Cytokinin

A. P-2, Q-4, R-1, S-3

B. P-4, Q-1, R-2, S-3

C. P-3, Q-1, R-2, S-4

D. P-4, Q-2, R-1, S-3

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Group I	Group II
P. Glycolytic pathway	1. Chloroplast
Q. Eukaryotic oxidative metabolism	2. Glyoxysomes
R. Glyoxylate cycle	3. Mitochondria
S. Calvin cycle	4. Cytosol

Photoreceptor	Moiety that absorbs light	Absorption (nm)
P. Phototropin	1. Chromobilin	a. 400 - 500
Q. Cryptochrome	2. FAD	b. 600 - 800
R. Phytochrome	3. FMN	c. 500 - 600

Group I	Group II
P. Picloram	1. Vitamin
Q. Zeatin	2. Auxin
R. Thiamine	3. Amino Acid
S. Glutamine	4. Cytokinin

Biochemistry in Biotechnology MCQ Questions & Answers | Biotechnology

21. Match items in Group I with Group II. Group I Group II P. Glycolytic pathway 1. Chloroplast Q. Eukaryotic oxidative metabolism 2. Glyoxysomes R. Glyoxylate cycle 3. Mitochondria S. Calvin cycle 4. Cytosol

Answer & Solution

22. The value of ΔG°, if given Kep is 1.7, at 23°C will be

Answer & Solution

23. Oxidation reduction reactions with positive standard redox potential (ΔE°) have

Answer & Solution

24. Identify the enzyme that catalyzes the following reaction. $$\alpha {\text{ - Ketoglutarate}} + NADH + NH_4^ + + {H^ + } \to {\text{Glutamate}} + NA{D^ + } + {H_2}O$$

Answer & Solution

25. Match the following photoreceptors with their prosthetic groups and spectral specificity Photoreceptor Moiety that absorbs light Absorption (nm) P. Phototropin 1. Chromobilin a. 400 - 500 Q. Cryptochrome 2. FAD b. 600 - 800 R. Phytochrome 3. FMN c. 500 - 600

Answer & Solution

26. The degree of inhibition for an enzyme catalyzed reaction at a particular inhibitor concentration is independent of initial substrate concentration. The inhibition follows

Answer & Solution

27. Which one of the following amino acid residues will destabilize an α-helix when inserted in the middle of the helix?

Answer & Solution

28. Determine the correctness or otherwise of the following Assertion (A) and Reason (R). Assertion: Plants convert fatty acids into glucose. Reason: Plants have peroxisomes.

Answer & Solution

29. The turnover numbers for the enzymes E1 and E2 are 150 s-1 and 15 s-1 respectively. This means

Answer & Solution

30. Match the chemicals in Group I with the possible type/class in Group II. Group I Group II P. Picloram 1. Vitamin Q. Zeatin 2. Auxin R. Thiamine 3. Amino Acid S. Glutamine 4. Cytokinin

Answer & Solution

21.
Match items in Group I with Group II.

Group I Group II

P. Glycolytic pathway 1. Chloroplast

Q. Eukaryotic oxidative metabolism 2. Glyoxysomes

R. Glyoxylate cycle 3. Mitochondria

S. Calvin cycle 4. Cytosol

22.
The value of ΔG°, if given K_ep is 1.7, at 23°C will be

23.
Oxidation reduction reactions with positive standard redox potential (ΔE°) have

24.
Identify the enzyme that catalyzes the following reaction.
$$\alpha {\text{ - Ketoglutarate}} + NADH + NH_4^ + + {H^ + } \to {\text{Glutamate}} + NA{D^ + } + {H_2}O$$

25.
Match the following photoreceptors with their prosthetic groups and spectral specificity

Photoreceptor Moiety that absorbs light Absorption (nm)

P. Phototropin 1. Chromobilin a. 400 - 500

Q. Cryptochrome 2. FAD b. 600 - 800

R. Phytochrome 3. FMN c. 500 - 600

26.
The degree of inhibition for an enzyme catalyzed reaction at a particular inhibitor concentration is independent of initial substrate concentration. The inhibition follows

27.
Which one of the following amino acid residues will destabilize an α-helix when inserted in the middle of the helix?

28.
Determine the correctness or otherwise of the following Assertion (A) and Reason (R).
Assertion: Plants convert fatty acids into glucose.
Reason: Plants have peroxisomes.

29.
The turnover numbers for the enzymes E1 and E2 are 150 s^-1 and 15 s^-1 respectively. This means

30.
Match the chemicals in Group I with the possible type/class in Group II.

Group I Group II

P. Picloram 1. Vitamin

Q. Zeatin 2. Auxin

R. Thiamine 3. Amino Acid

S. Glutamine 4. Cytokinin