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Biomolecules (Biology) · Question 79

AIPMT 2005MCQEasy📈 Topic in 88% papers+4−1
1

Which of the following is the simplest amino acid?

  1. Alanine
  2. Asparagine
  3. Glycine
  4. Tyrosine

Answer

(3) Glycine

Solution

As per NCERT, amino acids are substituted methanes with an amino group, an acid group, a hydrogen and a variable group designated as R group; based on the R group there are many amino acids, and when R is hydrogen the amino acid is called glycine.

⇒ Glycine (R = H) has the smallest R group, so it is the simplest amino acid; alanine has R = CH3.

Answer: (3)

AIPMT 2005

Keep practising — Biomolecules (Biology)

2

Nucleotides are building blocks of nucleic acids. Each nucleotide is a composite molecule formed by

  1. base-sugar-phosphate
  2. base-sugar-OH
  3. (base-sugar-phosphate)n
  4. sugar-phosphate
AIPMT 2005
3

Carbohydrates, the most abundant biomolecule on earth, are produced by

  1. some bacteria, algae and green plant cells
  2. fungi, algae and green plant cells
  3. all bacteria, fungi and algae
  4. viruses, fungi and bacteria.
AIPMT 2005
4

With which one of the following enzymes is copper necessarily associated as an activator?

  1. Carbonic anhydrase
  2. Tryptophanase
  3. Lactic dehydrogenase
  4. Tyrosinase
AIPMT 2004
5

The major role of minor elements inside living organisms is to act as

  1. co-factors of enzymes
  2. building blocks of important amino acids
  3. constituent of hormones
  4. binder of cell structure.
AIPMT 2003
6

In which one of the following nitrogen is not a constituent ?

  1. Pepsin
  2. Invertase
  3. Idioblast
  4. Bacteriochlorophyll
AIPMT 2003
7

Lipids are insoluble in water because lipid molecules are

  1. hydrophilic
  2. hydrophobic
  3. neutral
  4. zwitterions.
AIPMT 2002
8

Which of the following is a reducing sugar?

  1. Galactose
  2. Gluconic acid
  3. -methyl galactoside
  4. Sucrose
AIPMT 2002
9

Collagen is:

  1. Globular protein
  2. Fibrous protein
  3. Carbohydrate
  4. Lipid
AIPMT 2002
10

Most abundant organic compound on earth is

  1. Cellulose
  2. Steroids
  3. Protein
  4. Lipids
AIPMT 2001
11

Spoilage of oil can be detected by which fatty acid?

  1. Linolenic acid
  2. Erucic acid
  3. Linoleic acid
  4. Oleic acid
AIPMT 2001

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