Body Fluids and Circulation — Page 3 | NEET Biology

Q21

The genotype of B-group father of an O-group child is

A IO IO

B IB IB

C IA IB

D IO IB

Correct Answer

Option D

Solution

(d) If father has B blood group and child is O, father must have IB IO genotype.

Q22

Blood capillaries are made of single layer of endothelial cells

A endothelium, connective tissue and muscle fibres

B endothelium and muscle fibres

C endothelium and connective tissue

D endothelium only

Correct Answer

Option D

Solution

(d) Blood capillaries are made up of only endothelial cells.

Q23

A man with blood group A marries AB blood group woman. Which type of progeny indicates the man is not homozygous?

A AB B A O

B AB and B only

C A and AB only

D O type children

Correct Answer

Option B

Solution

(b) If man is IA IO (heterozygous), cross with IAIB produces AB and B progeny, indicating heterozygosity.

Q24

Cells formed in bone marrow include

A RBC

B RBC and leucocytes

C Leucocytes

D Lymphocytes

Correct Answer

Option B

Solution

(b) In adults, most blood corpuscles form in the peripheral region of red bone marrow in long bones.

Q25

A child of blood group O cannot have parents of blood groups

A AB and AB / O

B A and B

C B and B

D O and O

Correct Answer

Option A

Solution

(a) If a child has blood group O (genotype IO IO), parents with AB blood group cannot produce an O child.

Q26

Antigens are present on the surface of pathogens

A nucleus inside

B on cellular surface

C inside the cytoplasm

D on nuclear membrane

Correct Answer

Option B

Solution

(b) Antigens are foreign proteins present on the surface of cell membranes.

Q27

The lymph serves to

A transport oxygen to the brain.

B transport carbon dioxide to the lungs.

C return the interstitial fluid to the blood.

D return the WBCs and RBCs to the lymph nodes.

Correct Answer

Option C

Solution

(c) An important function of lymph is to return interstitial fluid back to the blood.

Q28

Which one of the following statements about blood constituents and transport of respiratory gases is most accurate?

A RBCs transport oxygen whereas WBCs do not transport CO2.

B RBCs transport oxygen whereas plasma transports only CO2 and other waste products.

C RBCs as well as WBCs transport oxygen, but only RBCs transport CO2.

D RBCs as well as plasma transport oxygen and CO2.

Correct Answer

Option D

Solution

(d) RBCs as well as plasma both carry oxygen and CO2 in dissolved and chemically combined form.

Q29

Sickle cell anaemia is characterised by

A Leukemia

B Polycythemia

C Mental retardation

D Haemolytic anaemia

Correct Answer

Option D

Solution

(d) Sickle cell anaemia is a genetic disease caused by denaturation of haemoglobin, resulting in haemolytic anaemia.

Q30

Presence of RBC in urine is:

A Alkaptonuria

B Ureathiasis

C Haematuria

D Proteinuria

Correct Answer

Option C

Solution

(c) Haematuria is presence of blood or RBCs in urine.