Question with Answer B. Pharma
1. Assume that the occurrence of nitrogen bases in adjacent positions in a DNA strand is random. Identify the minimum number of nucleotides in a DNA strand where GAAT can occur once on the basis of probability?
(a) 1024
(b) 512
(c) 256
(d) 4096
Ans. (c)
2. Some foreign DNA fragment is attached to Cla 1 site of pBR 322. This recombinant vector is used to transform Escherichia coli host cells. The cells subjected to transformation are plated on two different media- one containing ampicillin and the other containing tetracycline. The Transformed cells containing the recombinant vector
(a) will grow on ampicillin but not on tetracycline containing medium
(b) will grow on both tetracycline containing and ampicillin containing media
(c) will not grow on either tetracycline containing or ampicillin containing media
(d) will grow on tetracycline but not on ampicillin containing media
Ans. (b)
3. If the codon GGU is reserved, the resulting codon will code for this amino acid
(a) Thr
(b) Tyr
(c) Trp
(d) Leu
Ans. (c).
4. In flowering plants, the site of perception of light/dark duration is
(a) Floral meristem
(b) Stem
(c) Leaves
(d) Shoot apex
Ans. (b)
5. Skin colour in man is an example of
(a) polygenic inheritance
(b) Sex-linked inheritance
(c) Multiple allelism
(d) Pleiotropy
Ans. (a)
6. The inner lining of the ducts of sweat glands and pancreatic duct is formed by this epithelium
(a) Psdeudostratified
(b) Stratified cuboidal
(c) Stratified non-keratinised squamous
(d) transitional
Ans. (b)
7. Males produces sperms by mitosis in
(a) Lepisma
(b) Periplacenta Americana
(c) Apis mellifera
(d) Drosophila melanogaster
Ans. (c)
8. The protozoan with helipodia as locomotory structures
(a) Euglypha
(b) Actinophrys
(c) Entamoeba
(d) Elphidium
Ans. (b)
9. A Molluscan with calcareous spicules is
(a) Chaetoderma
(b) Lepidopleurus
(c) Doris
(d) Neopilina
Ans. (a)
10. Porteus anguinus is an example for
(a) Photokinesis
(b) Cicannular Rhythms
(c) Effect of light on pigmentation
(d) Phototaxis
Ans. (c)
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