Practice Pakistan's most useful MCQs for competitive exams

Proteins comprise of ___________% of the total dry weight of a cell?

• (A)  40%
• (B)  50%
• (C)  60%
• (D)  70%

Answer

Submitted By :Ali Uppal

Double fertilization occurs in_________?

• (A)  All plants
• (B)  All seed plants
• (C)  Gymnosperms
• (D)  Angiosperms

Answer

Submitted By :Ali Uppal

Hemoglobin molecule exhibits which structural organization of proteins___________?

• (A)  Primary structure
• (B)  Secondary structure
• (C)  Tertiary structure
• (D)  Quaternary structure

Answer

Submitted By :Ali Uppal

Locomotory structures are not found in which of the following group?

• (A)  Amoebas
• (B)  Zooflagellates
• (C)  Ciliates
• (D)  Apicomplexans

Answer

Submitted By :Ali Uppal

Which structure of protein gives information aboutnumber and sequence of amino acids in it_______________?

• (A)  Primary structure
• (B)  Secondary structure
• (C)  Tertiary structure
• (D)  Quaternary structure

Answer

Submitted By :Ali Uppal

Total number of amino acids in a hemoglobin molecule are__________?

• (A)  554
• (B)  564
• (C)  574
• (D)  584

Answer

Submitted By :Ali Uppal

A bond formed by linkage between -OH of carboxyl group of one amino acid and H of amino group of another amino acid which releases water is called__________?

• (A)  Phosphodiester linkage
• (B)  Glycosidic bond
• (C)  Peptide bond
• (D)  Hydrogen bond

Answer

Submitted By :Ali Uppal

The windpipe or trachea lies?

• (A)  Dorsal to oesophagus
• (B)  Ventral to oesophagus
• (C)  Lateral to oesophagus
• (D)  None of these

Answer

Submitted By :Ali Uppal

An insulin molecule consists of _________ polypeptide chains?

• (A)  1
• (B)  2
• (C)  3
• (D)  4

Answer

Submitted By :Ali Uppal

The major constituent of blood plasma is___________?

• (A)  Protein
• (B)  NaCl
• (C)  Water
• (D)  Cholesterol

Answer

Submitted By :Ali Uppal