NEET Biology 2022 PYQs

The gaseous plant growth regulator is used in plants to:

Given below are two statements:
Statement I: Cleistogamous flowers are invariably autogamous.
Statement II: Cleistogamy is disadvantageous as there is no chance for cross pollination.
In the light of the above statements, choose the correct answer from the options given below :

Identify the incorrect statement related to Pollination:

Given below are two statements:
Statement I: Mendel studied seven pairs of contrasting traits in pea plants and proposed the Laws of Inheritance.
Statement II: Seven characters examined by Mendel in his experiment on pea plants were seed shape and colour, flower colour, pod shape and colour, flower position and stem height.
In the light of the above statements, choose the correct answer from the options given below:

XO type of sex determination can be found in:

The process of translation of mRNA to proteins begins as soon as:

DNA polymorphism forms the basis of:

Read the following statements and choose the set of correct statements:
A. Euchromatin is loosely packed chromatin
B. Heterochromatin is transcriptionally active
C. Histone octomer is wrapped by negatively charged DNA in nucleosome
D. Histones are rich in lysine and arginine
E. A typical nucleosome contains 400 bp of DNA helix
Choose the correct answer from the options given below:

Which one of the following statement is not true regarding gel electrophoresis technique?

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Polymerase chain reaction is used in DNA amplification.
Reason (R): The ampicillin resistant gene is used as a selectable marker to check transformation
In the light of the above statements, choose the correct answer from the options given below :