List of top Life Science Questions

Following are the steps involved in processing of green tea:
A. Fermentation and drying
B. Twisting and rolling of leaves to facilitate break up
C. Initial removal of moisture content
D. Crushing, Tearing and Curling by CTC method
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Match List I with List II:
LIST I (Photoperiodism)LIST II (Explanation)
A. Short Day Plants (SDP)I. Dark period period of 14-16 hours
B. PRII. Absorbs light at 730-735nm
C. Long Day Plants (LDP)III. Daylight of about 14-16 hours
D. PFRIV. Absorbs light at 660-665nm
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The leaves used for wrapping tobacco in a ‘bidi’ are:
Choose the correct sequence of electron transport during electron transport chain of light reaction:
A. Pheophytin
B. Plastoquinone
C. Cytb6-f complex
D. Plastocyanin
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Taxol medicine used in treatment of cancer is extracted from:
Match List I with List II:
LIST I (Condition)LIST II (Characteristics)
A. Color blindnessI. Insensitivity to green and red light
B. Hemophilia BII. Deficiency of clotting factor IX
C. Hemophilia AIII. Deficiency of clotting factor VIII
D. G-6-PD deficiencyIV. Severe anemic condition
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Non-vascular land plants are called:
Which of the following statement is true for X-linked recessive inheritance?
Which of the following combinations of statements are true about C4 cycle?
A. Malic acid formed in the chloroplast of mesophyll cells.
B. Malic acid is transported to the chloroplast of bundle sheath cells.
C. Pyruvic acid produced in mesophyll cells moves to the chloroplast of bundle sheath cells.
D. Malic acid is transported to the chloroplast of mesophyll cells.
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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 statement is true for Barr body?
tRNA is synthesized by:
The histone that links two histone octamers is:
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 peptidyl transferase enzyme activity is located in the
Vessels are present in:
Match List I with List II
LIST I (Transposons)LIST II (Organism)
A. PelementI. Drosophila
B. LINE and SINEII. Human
C. Ty elementIII. Yeast
D. Tn elementIV. Bacteria
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Which one of the following is a peat moss?
The basal portion of a mature ligule of Selaginella is called:
On the basis of type of body cavity, platyhelminthes can be categorized as
Match List I with List II
List IList 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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A clotting disorder which is a sex-linked disease:
The perforation between left and right atria of a fetal heart is known as
The lymphoid stem cells in the bone marrow form
(A) Natural killer cells
(B) Platelets
(C) B lymphocytes
(D) Neutrophils
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Calcitonin is produced by