List of top Biology Questions

Inheritance of which of the following traits is shown in the cross given below?

Choose the correct option from the following:

Some of the important goals of HGP are given below. Choose the correct goal of HGP.

Human Immunodeficiency Virus is a member of the group of viruses known as:

When a pure tall pea plant (\textit{Pisum sativum}) with green pod is crossed with a dwarf pea plant with yellow pod, how many dwarf pea plants, out of 16, will be produced in the F\textsubscript{2 generation?}

Which of the following enzyme(s) are NOT essential for gene cloning?
A. Restriction enzymes
B. DNA ligase
C. DNA mutase
D. DNA recombinase
E. DNA polymerase

Match List I with List II

List I	List II
A. Pteridophyte	IV. Salvinia
B. Bryophyte	III. Polytrichum
C. Angiosperm	II. Ginkgo
D. Gymnosperm	I. Salvia

Consider the following:
A. The reductive division for human female gametogenesis starts earlier than that of male gametogenesis.
B. The gap between the first meiotic division and the second meiotic division is much shorter for males compared to females.
C. The first polar body is associated with the formation of the primary oocyte.
D. Luteinizing Hormone (LH) surge leads to disintegration of the endometrium and onset of menstrual bleeding.

Match List - I with List II

List I	List II
A. Scutellum	II. Cotyledon of Monocot seed
B. Non-albuminous seed	IV. Rudimentary cotyledon
C. Epiblast	III. Groundnut
D. Perisperm	I. Persistent nucellus

Match List - I with List II

List I	List II
A. The Evil Quartet	III. Causes of biodiversity losses
B. Ex situ conservation	I. Cryopreservation
C. Lantana camara	II. Alien species invasion
D. Dodo	IV. Extinction

The blue and white selectable markers have been developed which differentiate recombinant colonies from non-recombinant colonies on the basis of their ability to produce color in the presence of a chromogenic substrate. Given below are two statements about this method: Statement I: The blue-colored colonies have DNA insert in the plasmid, and they are identified as recombinant colonies. Statement II: The colonies without blue color have DNA insert in the plasmid, and are identified as recombinant colonies.

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): All vertebrates are chordates but all chordates are not vertebrates.
Reason (R): The members of subphylum Vertebrata possess a notochord during the embryonic period; the notochord is replaced by a cartilaginous or bony vertebral column in adults.

Consider the following statements regarding the function of adrenal medullary hormones:
A. It causes pupillary constriction.
B. It is a hyperglycemic hormone.
C. It causes piloerection.
D. It increases the strength of heart contraction.

Given below are two statements:
Statement I: The DNA fragments extracted from gel electrophoresis can be used in the construction of recombinant DNA.
Statement II: Smaller size DNA fragments are observed near the anode while larger fragments are found near the wells in an agarose gel.

Match List - I with List II

List I	List II
A. Adenosine	III. Nucleoside
B. Adenylic acid	II. Nucleotide
C. Adenine	I. Nitrogen base
D. Alanine	IV. Amino acid