List of top Plant Sciences Questions on Molecular Biology

Given below are two statements:
• [Statement (I):] Vertical resistance is exploited in agriculture by pathologists and breeders for crop improvement.
• [Statement (II):] Vertical resistance is mostly monogenic in nature.
In light of the above statements, choose the most appropriate answer from the options given below.

Given below are two statements, one is labelled as Assertion (A) and other labelled as Reason (R).
• [Assertion (A):] Deuteromycetes are known as 'Fungi Imperfecti'.
• [Reason (R):] In 'Deuteromycetes' only the asexual phase is known.
In light of the above statements, choose the correct answer from the options given below.

Given below are two statements, one is labelled as Assertion (A) and other labelled as Reason (R).
• [Assertion (A):] The genetic code is degenerative.
• [Reason (R):] The genetic code is nearly universal. In light of the above statements, choose the correct answer from the options given below.

Given below are two statements:
Statement (I): DNA replication proceeds in a bidirectional manner from multiple origins of replication in prokaryotic cells.
Statement (II): Okazaki fragments are short DNA fragments synthesized on the leading strand during DNA replication in both prokaryotic and eukaryotic cells.
In light of the above statements, choose the most appropriate answer from the options given below.

Given below are two statements, one is labelled as Assertion (A) and other labelled as Reason (R).
Assertion (A): In eukaryotic cells, the newly synthesized polypeptide chain is often modified after translation.
Reason (R): Post-translational modifications such as phosphorylation, glycosylation, and cleavage may occur to the polypeptide chain to attain its functional form.
In light of the above statements, choose the most appropriate answer from the options given below.

Which term is commonly used to describe the specific sequence of bases recognized by restriction enzymes?

Cannulae and Hami are the cellular structures found in

The number of possible combinations in a polypeptide containing any 7 amino acids is given by the figure

Human beings have a large-sized 'proteome'. The principal and more significant reason for this is-

Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A) : DNA replication is a semi-conservative process.
Reason (R) : In semi-conservative DNA replication, the two strands of DNA are separated, and each strand serves as a template for the synthesis of a new complementary strand. Therefore, each new double-stranded DNA molecule consists of one original strand and one newly synthesized strand.
In light of the above statements, choose the correct answer from the options given below.

How many nucleotides will be present in a double stranded DNA fragment of 2 kb ?

Which of the following is involved in the transfer of amino acids from cytoplasm to the ribosome for protein synthesis ?

Given below are two statements :
Statement (I): Irradiation of DNA with UV light cause formation of covalent bond between the thymine molecules on the same strand.
Statement (II): Thiamine dimerization in DNA caused by UV radiations can be reverted by Photo-reactivation.
In light of the above statements, choose the most appropriate answer from the options given below.

Given below are two statements :
Statement (I) : Insertion Sequences (IS) are short DNA sequences (800-1400 bp) and have the ability to transpose.
Statement (II) : IS also promotes recombination between non-homologous chromosomes.

Given below are two statements :
Statement (I) : James Watson, Francis Crick, and Maurice Wilkins were awarded the Nobel Prize for developing the double helical structure of DNA.
Statement (II) : Rosalind Franklin was not awarded the Nobel Prize for her contribution towards developing the double helical structure of DNA, because one Nobel Prize can not be shared with more than three persons at a time.