Biology - Comprehensive Mock Test 164
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Question 1631
Easy
The exchange of gases in a mammal takes place is?
A) trachea
B) Bronchioles
C) Bronchi
D) Alveoli
Solution Breakdown:
On the bronchioles are alveoli, where gas exchange takes place. These alveoli greatly increase the surface area:volume ratio, increasing the efficiency of gas exchange and more particles can diffuse at once.
Question 1632
Easy
In man, expired air contains oxygen about?
A) 4%
B) 10%
C) 16%
D) 20%
Solution Breakdown:
No Details
Question 1633
Medium
What percentage of the water that filters into the nephron is reabsorbed?
A) 25%
B) 75%
C) 85%
D) 99%
Solution Breakdown:
No Details
Question 1634
Medium
Watson and Crick composed the model of DNA structure in?
A) 1953
B) 1943
C) 1955
D) 1963
Solution Breakdown:
No Details
Question 1635
Easy
Rh factor derives its name from?
A) monkey
B) ape
C) rhino
D) human care
Solution Breakdown:
No Details
Question 1636
Easy
Heterosis is?
A) hybrid incompatibility
B) hybrid vigour
C) structural hybridity
D) hybrid sterility
Solution Breakdown:
No Details
Question 1637
Easy
“Barr body†is derived from?
A) autosomes in males
B) autosomes in females
C) X-chromosome in female
D) X-chromosome in males
Solution Breakdown:
No Details
Question 1638
Easy
Genes located on Y-chromosome are?
A) mutant genes
B) sex-linked genes
C) autosomal genes
D) holoandric genes
Solution Breakdown:
No Details
Question 1639
Easy
Inheritance of total colour-blindness is?
A) X-linked
B) XY-linked
C) Y-linked
D) none of these
Solution Breakdown:
No Details
Question 1640
Easy
Inheritance of total colour?
A) X-linked
B) XY-linked
C) Y-linked
D) none of these
Solution Breakdown:
No Details