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Biomolecules · Question 34

AIPMT 2009MCQEasy📈 Topic in 25% papers+4−1
1

The segment of DNA which acts as the instructional manual for the synthesis of the protein is

  1. ribose
  2. gene
  3. nucleoside
  4. nucleotide

Answer

(2) gene

Solution

As per NCERT, a gene is a segment of DNA that carries the coded message (sequence of bases) for the synthesis of a particular protein.

Ribose is a sugar, a nucleoside is base + sugar and a nucleotide is base + sugar + phosphate; none of them alone carries the message for a protein.

Answer: (2)

AIPMT 2009

Keep practising — Biomolecules

2

Which of the following hormones contains iodine?

  1. Testosterone
  2. Adrenaline
  3. Thyroxine
  4. Insulin
AIPMT 2009
3

In DNA, the complementary bases are

  1. adenine and guanine; thymine and cytosine
  2. uracil and adenine; cytosine and guanine
  3. adenine and thymine; guanine and cytosine
  4. adenine and thymine; guanine and uracil.
AIPMT 2008
4

Which of the following is an amine hormone?

  1. Insulin
  2. Progesterone
  3. Thyroxine
  4. Oxypurine
AIPMT 2008
5

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

  1. chiral bases
  2. chiral phosphate ester units
  3. D-sugar component
  4. L-sugar component
AIPMT 2007
6

Which of the following vitamins is water-soluble?

  1. Vitamin E
  2. Vitamin K
  3. Vitamin A
  4. Vitamin B
AIPMT 2007
7

The human body does not produce

  1. enzymes
  2. DNA
  3. vitamins
  4. hormones
AIPMT 2006
8

Which one of the following is a peptide hormone?

  1. Adrenaline
  2. Glucagon
  3. Testosterone
  4. Thyroxine
AIPMT 2006
9

During the process of digestion, the proteins present in food materials are hydrolysed to amino acids. The two enzymes involved in the process Proteins enzyme (A) Polypeptide enzyme (B) Amino acids are respectively

  1. invertase and zymase
  2. amylase and maltase
  3. diastase and lipase
  4. pepsin and trypsin
AIPMT 2006
10

Which functional group participates in disulphide bond formation in proteins?

  1. Thioester
  2. Thioether
  3. Thiol
  4. Thiolactone
AIPMT 2005
11

The cell membranes are mainly composed of

  1. fats
  2. proteins
  3. phospholipids
  4. carbohydrates
AIPMT 2005

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