Biology Mcqs

Functional units of lungs are called________?

• (A)  Alveoli
• (B)  Air sacs
• (C)  Parabronchi
• (D)  None of these

Answer

Submitted By :Ali Uppal

Breaking of terminal phosphate of ATP releases about ___________ Kcal of energy?

• (A)  6.1
• (B)  6.3
• (C)  7.1
• (D)  7.3

Answer

Submitted By :Ali Uppal

ATP are consumed during___________?

• (A)  Glycolysis
• (B)  Kreb’s cycle
• (C)  Light dependent phase
• (D)  none of these

Answer

Submitted By :Ali Uppal

Cellular respiration is essentially a/an _____________ process?

• (A)  Oxidation.
• (B)  Reduction.
• (C)  Redox.
• (D)  None of the abov

Answer

Submitted By :Ali Uppal

Percentage of CO2 carried as carboxyhaemoglobin is_________?

• (A)  5%
• (B)  70%
• (C)  20%
• (D)  10%

Answer

Submitted By :Ali Uppal

The increase in pH of blood has ________ effect on the oxygen carrying capacity of haemogolobin?

• (A)  plus ve
• (B)  – ve
• (C)  No
• (D)  All of these

Answer

Submitted By :Ali Uppal

The glycolate produced diffuses into the membrane bounded organelles called____________?

• (A)  Glyoxisomes
• (B)  Peroxisomes
• (C)  Lysosomes
• (D)  Mitochondria

Answer

Submitted By :Ali Uppal

The air spaces may comprise upto _________ of total volume of leaf surface?

• (A)  30%
• (B)  20%
• (C)  40%
• (D)  50%

Answer

Submitted By :Ali Uppal

There are _________ stomata per square cm of leaf surface in Tobacco plants?

• (A)  1200
• (B)  12000
• (C)  100,000
• (D)  1000

Answer

Submitted By :Ali Uppal

Important factors which affect the capacity of haemoglobin to combine with oxygen is

• (A)  Temperature
• (B)  Carbon dioxide
• (C)  pH
• (D)  All of these

Answer

Submitted By :Ali Uppal