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

The transfer of rDNA into a bacterial cell for the purpose of its cloning, is assisted by ________ ions.

A

$\mathrm{Mg}^{++}$

B

$\mathrm{Ca}^{++}$

C

$\mathrm{Cl}^{-}$

D

$\mathrm{K}^{+}$

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

Detritus food chain begins with ___________ .

A

dead organic matter

B

living plants

C

soil bacteria

D

living animals

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

The purpose of biological treatment of sewage is to __________ .

A

reduce its BOD

B

increase its BOD

C

reduce sedimentation

D

increase sedimentation

4
MHT CET (PCB) 2025 9th April Evening Shift
MCQ (Single Correct Answer)
+1
-0

According to Darwinism, __________ leads to evolution.

A

descent with modification

B

inheritance of acquired characters

C

variations produced in germplasm

D

sudden and inheritable changes