Question No:1
Cauliflower mosaic virus contain
(A) ss RNA
(B) ds RNA
(C) ds DNA
(D) ss DNA
Question No:2
In three dimensional view, a transfer RNA molecule appear as
(A) L shaped
(B) E shaped
(C) Y shaped
(D) S shaped
Question No:3
Length of one turn of the helix in a B form DNA is approximately
(A) 3.4 nm
(B) 2nm
(C) 0.34nm
(D) 20 nm
Question No:4
One of the similarities between DNA and RNA is that both
(A) Are polymers of nucleotides
(B) Are capable of replicating
(C) Have similar sugars
(D) Have similar pyrimidine bases
Question No:5
Which is an essential amino acid?
(A) Serine
(B) Aspartic acid
(C) Glycine
(D) Phenylalanine
Question No:6
ATP is a
(A) Nucleotide
(B) Nucleosome
(C) Nucleside
(D) Purine
Question No:7
Growth of multicellular orgaisms is initiated by
(A) Cell division
(B) Cell enlargement
(C) Cell differentiation
(D) Morphogenesis
Question No:8
Cell cycle includes
(A) Duplication of genome
(B) (b Duplication of other cell constituents
(C) Cell division
(D) All
Question No:9
Human cells in culture divide approximately for every
(A) 90 minutes
(B) 19 minutes
(C) 24 hours
(D) One hour
Question No:10
Yeast cells can progress through the cell cycle in about
(A) 90 minutes
(B) 19 minutes
(C) 90 seconds
(D) 19 seconds
Question No:11
In human cell cycle, interphase lasts for about
(A) 70%
(B) 95%
(C) 80%
(D) 25%
Question No:12
M phase of cell cycle starts with
(A) Duplication of DNA
(B) Karyokinesis
(C) Cytokinesis
(D) Division of chromosomes
Question No:13
During this phase of cell cycle, cell is metabolically active without duplication of DNA
(A) M-phase
(B) S-phase
(C) G1 phase
(D) G2 phase
Question No:14
The amount of DNA per cell remains same during
(A) S, G2 and metaphase
(B) G1, G2, M phase
(C) Anaphase, Telophase, G2 phase
(D) (a) and (c)
Question No:15
The amount of DNA in a cell in G1, phase is
(A) Half that of S-phase
(B) Half that of G2 phase
(C) Half that of prophase
(D) All
Question No:16
In animal cell-cycle, centriole duplicates during
(A) G1 phase
(B) G2 phase
(C) S-phase
(D) M-phase
Question No:17
Proteins and RNA synthesis occurs during
(A) S phase and G1, phase
(B) G1 and G2 phase
(C) G1and M-phase
(D) S and G2 phase
Question No:18
Cells in this stage can enter into G0 stage
(A) S-phase
(B) G2 phase
(C) G1, phase
(D) M-phase
Question No:19
These cells of adult animals don’t divide
(A) Liver Cells
(B) Heart cells
(C) Nerve cells
(D) (b) and (c)
Question No:20
In animals, mitotic cell division is only seen in
(A) Haploid somatic cells
(B) Diploid somatic cells
(C) Diploid meiocytes
(D) (a) and (c)