1
MHT CET (PCB) 2025 9th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following statements are correct regarding chromosomal basis of sex determination?

i. The mechanism of sex determination in insect is XX - XO type.

ii. In honey-bee, haplo-diploid type of sex determination is observed.

iii. Human males have homomorphic sex chromosomes.

iv. Human females have heteromorphic sex chromosomes.

v. Chromosomal mechanism of sex determination in birds is ZW-ZZ type.

A

i, ii and v only

B

iii and iv only

C

i, ii and iv only

D

ii, iv and v only

2
MHT CET (PCB) 2025 9th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following is INCORRECT in case of severe haemorrhage?

A

Osmoreceptors in hypothalamus stimulate ADH secretion.

B

ADH stimulates reabsorption of water from last part of DCT and entire collecting duct.

C

Urine volume increases.

D

Osmolarity of blood decreases.

3
MHT CET (PCB) 2025 9th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

Select the INCORRECT statements.

i. The rate of formation of $\mathrm{H}_2 \mathrm{CO}_3$ is slower in RBCs and faster in plasma.

ii. Dissociation of $\mathrm{H}_2 \mathrm{CO}_3$ into $\mathrm{H}^{+}$and $\mathrm{HCO}_3^{-}$ takes place due to carbonic anhydrase.

iii. The carbonic anhydrase is present in leucocytes,

iv. The prosthetic group of carbonic anhydrase is Mn .

Select the correct option.

A
i and iv only
B
ii and iii only
C
i, iii and iv only
D
i, ii and iv only
4
MHT CET (PCB) 2025 9th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

Following table shows ABO blood group in man. Observe carefully and identify 'P', 'Q' and ' R '.

MHT CET (PCB) 2025 9th April Morning Shift Biology - Principles of Inheritance and Variation Question 2 English
A

$\quad \mathrm{P}-\mathrm{I}^{\mathrm{A}} \mathrm{I}^{\mathrm{A}}, \quad \mathrm{Q}-\mathrm{AB}, \quad \mathrm{R}-$ antibody a

B

$\quad \mathrm{P}-\mathrm{I}^{\mathrm{A}} \mathrm{I}^{\mathrm{B}}, \quad \mathrm{Q}-\mathrm{NIL}, \quad \mathrm{R}-$ antibody b

C

$\mathrm{P}-\mathrm{I}^{\mathrm{B}} \mathrm{I}^{\mathrm{B}}, \quad \mathrm{Q}-\mathrm{B}, \quad \mathrm{R}-\mathrm{NIL}$

D

$\quad \mathrm{P}-\mathrm{I}^{\mathrm{O}} \mathrm{I}^{\mathrm{A}}, \quad \mathrm{Q}-\mathrm{A}, \quad \mathrm{R}-$ antibody ab