Practice Pakistan's most useful MCQs for competitive exams

95% of the cytoplasm of RBCs is____________?

• (A)  Hemoglobin
• (B)  Enzymes
• (C)  Salts
• (D)  Other proteins

Answer

Submitted By :Ali Uppal

Production of genetically identical copies of organisms/cells by asexual reproduction is called__________?

• (A)  Mitosis
• (B)  Replication
• (C)  Cloning
• (D)  Biological control

Answer

Submitted By :Ali Uppal

An antibody is made of _________ polypeptide chains?

• (A)  1
• (B)  2
• (C)  3
• (D)  4

Answer

Submitted By :Ali Uppal

______________ of earth surface is covered with water?

• (A)  10%
• (B)  30%
• (C)  75%
• (D)  90%

Answer

Submitted By :Ali Uppal

Movement of the material across the cell membrane which does not requiring expenditure of metabolic energy is called__________?

• (A)  Active transport
• (B)  Passive transport
• (C)  Co-transport
• (D)  Counter transport

Answer

Submitted By :Ali Uppal

Ecosystem not found in Pakistan is_____________?

• (A)  Tropical rain forest
• (B)  Temperate deciduous forest
• (C)  Grassland
• (D)  Tundra

Answer

Submitted By :Ali Uppal

Which of the following is most constant abiotic component of ecosystem___________?

• (A)  Air
• (B)  Water
• (C)  Land
• (D)  Gravity

Answer

Submitted By :Ali Uppal

Percentage of proteins in cell membrane is____________?

• (A)  20-40%
• (B)  40-50%
• (C)  60-80%
• (D)  80-100%

Answer

Submitted By :Ali Uppal

_____________ supported theory of special creation?

• (A)  Linnaeus
• (B)  Aristotle
• (C)  Mendel
• (D)  Lamarck

Answer

Submitted By :Ali Uppal

In Hardy-Weinberg formula P2 represents frequency of_____________?

• (A)  Recessive allele
• (B)  Dominant allele
• (C)  Homozygous dominant individual
• (D)  Homozygous recessive individual

Answer

Submitted By :Ali Uppal