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

Select the INCORRECT statement regarding RNA world hypothesis.

A
RNA can self replicate via ribozymes.
B
RNA catalyses protein synthesis.
C
Varieties of RNA are formed due to mutation of RNA.
D
RNA is the only stable genetic material, which is responsible for rich biodiversity on earth.
2
MHT CET (PCB) 2024 22th April Evening Shift
MCQ (Single Correct Answer)
+1
-0

Choose the correct statement(s) with respect to Down's syndrome

i. Down's syndrome results from non-disjunction of $21^{\text {st }}$ chromosome during gamete formation.

ii. Down's syndrome is a sex chromosomal disorder observed in immature mothers who are below the age of 18 .

iii. These patients have mild mental retardation, poor skeletal development, flat hands, stubby fingers and palms are broader.

iv. The have 44 A with XO type of karyotype.

v. The risk of giving birth to a Down Syndrome child is more in mothers who are over 45 years of age.

A
ii and iv only
B
i, iii and v only
C
i and ii only
D
only V
3
MHT CET (PCB) 2024 22th April Evening Shift
MCQ (Single Correct Answer)
+1
-0

What is the horizontal distribution of different species occupying levels on land or in water called?

A
Stratification
B
Niche
C
Ecosystem
D
Zonation
4
MHT CET (PCB) 2024 22th April Evening Shift
MCQ (Single Correct Answer)
+1
-0

Identify the element having highest value of first ionization enthalpy.

A
Se
B
Br
C
Xe
D
Ar