Practice Pakistan's most useful MCQs for competitive exams

Total number of amino acids discovered so far in cells and tissues are______________?

• (A)  20
• (B)  25
• (C)  150
• (D)  170

Answer

Submitted By :Ali Uppal

Hunger pangs usually begin ______ after the previous meal.

• (A)  2-4 hours
• (B)  6-8 hours
• (C)  10-12 hours
• (D)  12-24 hours

Answer

Submitted By :Ali Uppal

Which structural organization is most common in globular proteins____________?

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

Answer

Submitted By :Ali Uppal

Amphoixus is a__________?

• (A)  Chordate
• (B)  Protochordate
• (C)  Lower chordate
• (D)  All of these

Answer

Submitted By :Ali Uppal

The simplest of oxygen producting photosynthetic organisms are____________?

• (A)  Algae
• (B)  Bacteria
• (C)  Cyanobacteria
• (D)  Chlamydomonas

Answer

Submitted By :Ali Uppal

Antibodies play important role against microorganisms and other pathogens to which type of proteins do they belong________?

• (A)  Globular proteins
• (B)  Fibrous Proteins
• (C)  Both a and b
• (D)  None of these

Answer

Submitted By :Ali Uppal

Membranes of the grane are sites where?

• (A)  Oxygen is stored
• (B)  Food is stored
• (C)  Sunlight is trapped
• (D)  CO2 is stored.

Answer

Submitted By :Ali Uppal

Each turn of DNA contain ____________ nitrogenous base pairs?

• (A)  5
• (B)  10
• (C)  20
• (D)  25

Answer

Submitted By :Ali Uppal

Protein coasts of viruses are synthesized in____________?

• (A)  Lytic cycle
• (B)  Lysogenic cycle
• (C)  Both a & b
• (D)  All of these

Answer

Submitted By :Ali Uppal

Which of the following statement is incorrect about RNA_________________?

• (A)  The pentose sugar in it is Ribose.
• (B)  It contains Adenine Guanine Thymine and Cytosine
• (C)  It is present in the nucleoli
• (D)  It may be folded back on itself to give double helical characteristics.

Answer

Submitted By :Ali Uppal