Biomolecules - Organic Chemistry - Chemistry Previous Year Questions

1

2017 · Chemistry · Organic Chemistry · Biomolecules

KCET 2017

Hormones are secreted by ductless glands of human body. Iodine containing hormone is

A

Adrenoline

B

Thyroxine

C

Testosterone

D

Insulin

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2

2017 · Chemistry · Organic Chemistry · Biomolecules

KCET 2017

Pick the wrong statements from the following.

A

Deficiency of vitamin B6 (pyridoxime) results in convulsions

B

Sources of vitamin are yeast, milk, green vegetables and cereals

C

deficiency of vitamin D cause xerophthalmia

D

Consumption of citrus fruits and green leafy vegetables in food prevents scurvy

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3

2017 · Chemistry · Organic Chemistry · Biomolecules

KCET 2017

The glycosidic linkage present in sucrose is between

A

$\mathrm{C}-1$ of $-\beta$ glucose and $\mathrm{C}-4$ of $\alpha$-glucose

B

$\mathrm{C}-1$ of $\alpha$ - glucose and $\mathrm{C}-4$ of $\beta$ - fructose

C

$\mathrm{C}-1$ of $\alpha$ - glucose and $\mathrm{C}-4$ of $\alpha$-glucose

D

$\mathrm{C}-1$ of $\alpha$-glucose and $\mathrm{C}-2$ of $\beta$-fructose

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4

2018 · Chemistry · Organic Chemistry · Biomolecules

KCET 2018

Which of the following bases is not present in DNA?

A

Adenine

B

Cytosine

C

Guanine

D

Uracil

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5

2018 · Chemistry · Organic Chemistry · Biomolecules

KCET 2018

The glycosidic linkage involved in linking the glucose units in amylase part of starch is

A

$\mathrm{C}_1-\mathrm{C}_4 \beta$-linkage

B

$\mathrm{C}_1-\mathrm{C}_6 \alpha$-linkage

C

$\mathrm{C}_1-\mathrm{C}_6 \beta$-linkage

D

$\mathrm{C}_1-\mathrm{C}_4 \alpha$-linkage

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6

2019 · Chemistry · Organic Chemistry · Biomolecules

KCET 2019

The vitamin that helps in clotting of blood is

A

A

B

C

C

B\(_2\)

D

K

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7

2019 · Chemistry · Organic Chemistry · Biomolecules

KCET 2019

In nucleic acids, the nucleotides are joined together by

A

Phosphoester linkage

B

Phosphodiester linkage

C

Phosphodisulphide linkage

D

Sulphodiester linkage

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8

2019 · Chemistry · Organic Chemistry · Biomolecules

KCET 2019

Which of the following is generally water insoluble?

A

Fibrous protein

B

Vitamin-C

C

Amylose

D

Glycine

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9

2020 · Chemistry · Organic Chemistry · Biomolecules

KCET 2020

Hypothyroidism is caused by the deficiency of

A

vitamin B-12

B

adrenalin

C

thyroxine

D

glucocorticoid

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10

2020 · Chemistry · Organic Chemistry · Biomolecules

KCET 2020

Which one of the following vitamins is not stored in adipose tissue?

A

A

B

B\(_6\)

C

D

D

E

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11

2020 · Chemistry · Organic Chemistry · Biomolecules

KCET 2020

\(\mathrm{C}_1-\mathrm{C}_4\) glycosidic bond is not found in

A

maltose

B

sucrose

C

lactose

D

starch

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12

2021 · Chemistry · Organic Chemistry · Biomolecules

KCET 2021

Primary structure in a nucleic acid contain 3 bases as GATGC ... The chain which is complementary to this chain is

A

G G T G A...

B

TGA A G...

C

C T A C G...

D

TTTAG...

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13

2021 · Chemistry · Organic Chemistry · Biomolecules

KCET 2021

RNA and DNA are chiral molecules, their chirality is due to the presence of

A

D-sugar component

B

L-sugar component

C

chiral bases

D

chiral phosphate ester unit

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14

2022 · Chemistry · Organic Chemistry · Biomolecules

KCET 2022

A nucleic acid, whether DNA or RNA gives on complete hydrolysis, two purine bases, two pyrimidine bases, a pentose sugar and phosphoric acid. Nucleotides which are intermediate products in the hydrolysis contain

A

a purine base, pentose sugar and ortho-phosphoric acid

B

purine or pyrimidine base and ortho-phosphoric acid

C

purine or pyrimidine base, a pentose sugar and ortho-phosphoric acid

D

purine or pyrimidine base and pentose sugar

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15

2023 · Chemistry · Organic Chemistry · Biomolecules

KCET 2023

Thyroxine produced in the thyroid gland is an iodinated derivative of

A

threonine

B

lysine

C

tyrosine

D

tryptophan

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16

2023 · Chemistry · Organic Chemistry · Biomolecules

KCET 2023

The correct order of match between column X and column Y is

	X		Y
I.	Vitamin A	i.	Muscular weakness
II.	Vitamin D	ii.	Increased blood clotting time
III.	Vitamin E	iii.	Night-blindness
IV.	Vitamin K	iv.	Osteomalacia

A

I-iv, II-iii, III-ii, IV-i

B

I-ii, II-i, III-iii, IV-iv

C

I-iii, II-ii, III-iv, IV-i

D

I-iii, II-iv, III-i, IV-ii

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17

2023 · Chemistry · Organic Chemistry · Biomolecules

KCET 2023

Sucrose is dextrorotatory but after hydrolysis the mixture show laevorotation, this is because of

A

laevorotation of glucose is more than dextrorotation of fructose.

B

sucrose is a non-reducing sugar.

C

racemic mixture is formed.

D

laevorotation of fructose is more than dextrorotation of glucose.

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18

2023 · Chemistry · Organic Chemistry · Biomolecules

KCET 2023

Receptors are proteins and crucial to body communication process. These receptors are embedded in

A

cell membrane

B

protein

C

endocrine gland

D

chromosomes

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19

2024 · Chemistry · Organic Chemistry · Biomolecules

KCET 2024

The type of linkage present between nucleotides is

A

phosphoester linkage

B

phosphodiester linkage

C

amide linkage

D

glycosidic linkage

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20

2024 · Chemistry · Organic Chemistry · Biomolecules

KCET 2024

$\alpha-D-(+)$-glucose and $\beta-D-(+)$-glucose are

A

enantiomers

B

conformers

C

epimers

D

anomers

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