Biochemistry - General Biology - Biotechnology Previous Year Questions

1

2013 · Biotechnology · General Biology · Biochemistry

Biotechnology (BT) 2013

Match the entries in Group I with the enzymes in Group II.

Group I	Group II
P. NAD+	1. Glutathione peroxidase
Q. Selenium	2. Nitrogenase
R. Pyridoxal phosphate	3. Lactate dehydrogenase
S. Molybdenum	4. Glycogen phosphorylase

A

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

B

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

C

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

D

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

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2

2013 · Biotechnology · General Biology · Biochemistry

Biotechnology (BT) 2013

The number of molecules present in this solution is

A

\(40.15 \times 10^{19}\)

B

\(6.023 \times 10^{19}\)

C

\(4.015 \times 10^{19}\)

D

\(0.08 \times 10^{19}\)

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3

2013 · Biotechnology · General Biology · Biochemistry

Biotechnology (BT) 2013

Mahatma Gandhi was known for his humility as

A

he played an important role in humiliating exit of British from India.

B

he worked for humanitarian causes.

C

he displayed modesty in his interactions.

D

he was a fine human being.

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4

2014 · Biotechnology · General Biology · Biochemistry

Biotechnology (BT) 2014

The product(s) resulting from the hydrolysis of maltose is/are

A

a mixture of α-D-Glucose and β-D-Glucose

B

a mixture of D-Glucose and L-Glucose

C

α-D-Glucose only

D

β-D-Glucose only

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5

2014 · Biotechnology · General Biology · Biochemistry

Biotechnology (BT) 2014

Amino acid residue which is most likely to be found in the interior of water-soluble globular proteins is

A

Threonine

B

Aspartic acid

C

Valine

D

Histidine

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6

2014 · Biotechnology · General Biology · Biochemistry

Biotechnology (BT) 2014

The reactions leading to the formation of amino acids from the TCA cycle intermediates are

A

carboxylation

B

isomerization

C

transamination

D

decarboxylation

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7

2014 · Biotechnology · General Biology · Biochemistry

Biotechnology (BT) 2014

Cholera toxin increases cAMP levels by

A

modifying G_s protein

B

modifying G_i protein

C

binding to adenylate cyclase

D

activating cAMP phosphodiesterase

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8

2014 · Biotechnology · General Biology · Biochemistry

Biotechnology (BT) 2014

Match the following photoreceptors with their prosthetic groups and spectral specificity

Photoreceptor
P. Phototropin
Q. Cryptochrome
R. Phytochrome

Moiety that absorbs light
1. Chromobilin
2. FAD
3. FMN

Absorption (nm)
a. 400-500
b. 600-800
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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9

2014 · Biotechnology · General Biology · Biochemistry

Biotechnology (BT) 2014

The percentage SIMILARITIES and IDENTITIES, respectively, between the two peptide sequences given below will be _____% and _____%.
Peptide I : Ala-Ala-Arg-Arg-Gln-Trp-Leu-Thr-Phe-Thr-Lys-Ile-Met-Ser-Glu
Peptide II: Ala-Ala-Arg-Glu-Gln-Tyr-Ile-Ser-Phe-Thr-Lys-Ile-Met-Arg-Asp

A

80, 80

B

80, 60

C

60, 60

D

90, 60

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10

2016 · Biotechnology · General Biology · Biochemistry

Biotechnology (BT) 2016

Disaccharide molecules that contain β(1 → 4) glycosidic linkage are

A

sucrose and maltose

B

sucrose and isomaltose

C

maltose and isomaltose

D

lactose and cellobiose

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11

2017 · Biotechnology · General Biology · Biochemistry

Biotechnology (BT) 2017

Natural proteins are composed primarily of 20 α-amino acids. Which one of the following statements is true for any of these amino acids in a solution of pH 1.5?

A

Only the amino group is ionized.

B

Only the carboxylic acid group is ionized.

C

Both amino and carboxylic acid groups are ionized.

D

Both amino and carboxylic acid groups are neutral.

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12

2017 · Biotechnology · General Biology · Biochemistry

Biotechnology (BT) 2017

Which one of the following amino acids has three ionizable groups?

A

Glycine

B

Leucine

C

Valine

D

Lysine

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13

2017 · Biotechnology · General Biology · Biochemistry

Biotechnology (BT) 2017

If the chemical composition of proteins in an organism is \( CH_{1.5}O_{0.3}N_{0.3}S_{0.004} \), the mass percentage of carbon in the proteins is _______.
Given data: Atomic weights (Da) of C = 12, H = 1, O = 16, N = 14, and S = 32.

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14

2019 · Biotechnology · General Biology · Biochemistry

Biotechnology (BT) 2019

Which one of the following need NOT be conserved in a biochemical reaction?

A

Total mass

B

Total moles

C

Number of atoms of each element

D

Total energy

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15

2019 · Biotechnology · General Biology · Biochemistry

Biotechnology (BT) 2019

The mass of 1 kmol of oxygen molecules is ________ g (rounded off to the nearest integer).

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16

2019 · Biotechnology · General Biology · Biochemistry

Biotechnology (BT) 2019

In general, which one of the following statements is NOT CORRECT?

A

Hydrogen bonds result from electrostatic interactions

B

Hydrogen bonds contribute to the folding energy of proteins

C

Hydrogen bonds are weaker than van der Waals interactions

D

Hydrogen bonds are directional

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17

2019 · Biotechnology · General Biology · Biochemistry

Biotechnology (BT) 2019

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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18

2020 · Biotechnology · General Biology · Biochemistry

Biotechnology (BT) 2020

Which of the following types of molecules act as biological catalysts?

A

P and Q only

B

P and R only

C

Q and R only

D

P, Q and R

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19

2021 · Biotechnology · General Biology · Biochemistry

Biotechnology (BT) 2021

Which of the following chemical messenger(s) is/are derivative(s) of tryptophan?

A

γ-amino butyric acid

B

Indole acetic acid

C

Melatonin

D

Serotonin

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20

2022 · Biotechnology · General Biology · Biochemistry

Biotechnology (BT) 2022

Terpenoids are made of __________ units

A

amino acid

B

carbohydrate

C

isoprene

D

triacylglycerol

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