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

In an operon, when repressor protein attaches to the operator then __________ .

A

the operator is switched on.

B

the structural genes are expressed.

C

the chemical inducer is synthesized.

D

the structural genes are not expressed.

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

Example of geographical isolation is __________

A

Darwin's finches

B

Mule

C

Australian Marsupials

D

Cichlid fishes

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

Match Column I containing names of enzymes with Column II containing their microbial source.

Column I
Column II
i. Invertase a. Sclerotinialibertine
ii. Pectinase b. Trichoderma koningii
iii. Lipase c. Saccharomyces cerevisiae
iv. Cellulase d. Candida lipolytica
Choose the correct option:
A

i - c, ii - b, iii - d, iv -a.

B

i-a, ii-d, iii-c, iv-b.

C

i-a, ii-c, iii-d, iv-b.

D

i-c, ii -a, iii -d, iv -b.

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

The terminal stage of xerarch succession is represented by _________ .

A

mosses

B

trees

C

shrubs

D

lichens