List of top Life Science Questions

Arrange the steps involved in Gram-stain procedure:
(A) Staining with Crystal Violet
(B) Staining with Gram’s Iodine
(C) Decolorization
(D) Staining with Safranine
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Match List I with List II:

LIST I (Condition)	LIST II (Characteristics)
A. Color blindness	I. Insensitivity to green and red light
B. Hemophilia B	II. Deficiency of clotting factor IX
C. Hemophilia A	III. Deficiency of clotting factor VIII
D. G-6-PD deficiency	IV. Severe anemic condition

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Identify the correct sequence of the given enzymes involved in the TCA cycle:
(A) Aconitase
(B) Fumarase
(C) Malate dehydrogenase
(D) α-ketoglutarate dehydrogenase
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Amino acid that serves as a precursor for formation of the pigment responsible for human skin color is-

The complete proteins produced by an organism at any one time is called:

The peptidyl transferase enzyme activity is located in the

Match List I with List II:

List I (Enzyme)	List II (Reaction)
(A) DNase I	(I) Produces single-stranded nicks in DNA
(B) RNase A	(II) Degrades single-stranded RNA
(C) S1 nuclease	(III) Degrades single-stranded DNA
(D) RNase H	(IV) Cleaves the RNA strand of RNA-DNA hybrids

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Adenoviruses are frequently used in gene delivery experiments. Their average genome size is 36,000 base pairs. Of their total DNA content, up to how much of the adenovirus genome can be replaced by foreign DNA?

Which of the following enzyme is inhibited by citrate in Kreb's cycle?

Yellow fever is caused due to the human-to-human transmission by-

On the basis of type of body cavity, platyhelminthes can be categorized as

What percentage of genes are found in the human genome?

In the human karyotype, chromosomes are divided into how many groups?

In the human karyotype, the X chromosome belongs to which group?

Transcription factors that mediate the binding of RNA polymerase to DNA template are
A. TFIIA
B. TATA box
C. TFIIB
D. Small nuclear ribonucleoproteins
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The gene transmission from a male parent to a female offspring (“child”) to a male “grandchild” is called:

Which of the following enzyme is defective in galactosemia—a fatal genetic disorder in infants?

Which of the following statement is true for X-linked recessive inheritance?

tRNA is synthesized by:

Which of the following statement is true for Barr body?

Which of the following is the example of Gram-negative bacteria?

Non-vascular land plants are called:

Match List I with List II

List I	List II
(A) Radiation hybrid mapping	(I) DNA can be cut into large fragments and circularized for use in chromosome walking
(B) Sequence tagged site (STS) mapping	(II) Useful for cloning of overlapping DNA fragments (restricted to about 200 kb)
(C) Chromosome jumping	(III) Fragment genome into large pieces and locate markers and genes
(D) Chromosome walking	(IV) Applicable to any part of DNA sequence if some sequence information is available

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Which of the following are viral diseases?
(A) Yellow fever
(B) Hepatitis B
(C) Chickenpox
(D) Rabies
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Arrange the given processes involved in the nitrogen cycle:
(A) Ammonia formation
(B) Organic nitrogen formation
(C) Soil organic nitrogen formation
(D) Nitrate formation
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