1
MHT CET (PCB) 2024 22th April Evening Shift
MCQ (Single Correct Answer)
+1
-0

In a polarised state of nerve membrane, sodiumpotassium exchange pump actively restores the ions on their appropriate side because ________ against concentration electrochemical gradient.

A
$\mathrm{Na}^{+}$is forced out and $\mathrm{K}^{+}$is forced inside the membrane
B
both $\mathrm{Na}^{+}$and $\mathrm{K}^{+}$are forced out equally
C
both $\mathrm{Na}^{+}$and $\mathrm{K}^{+}$ions are forced inside
D
$\mathrm{K}^{+}$is forced out and $\mathrm{Na}^{+}$is forced inside the membrane
2
MHT CET (PCB) 2024 22th April Evening Shift
MCQ (Single Correct Answer)
+1
-0

Female Aedes mosquito acts as a vector in the transmission of ________

A
malaria .
B
dermatophytosis
C
dengue
D
pneumonia
3
MHT CET (PCB) 2024 22th April Evening Shift
MCQ (Single Correct Answer)
+1
-0

Match types of niche in Column I with its explanation in Column II.

Column I
(Type of niche)
Column II
(Explanation)
i. Habitat a. absence of all competitors
ii. Hypervolume b. physical space occupied by the organism
iii. Fundamental c. presence of competition for resources
iv. Realized d. considers biotic and abiotic environmental factors
Select the correct option
A
i - b ii - d iii - c iv - a
B
i-b ii - d iii - a iv - c
C
i-d ii-b iii-a iv-c
D
i-d ii - b iii - c iv -a
4
MHT CET (PCB) 2024 22th April Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which one of the following is considered as molecular scissors in modern biotechnology?

A
Reverse transcriptase
B
Taq polymerases
C
Alkaline phosphatases
D
Restriction endonucleases