1. The maximum frequency of recombination of genes at two loci can be (JNU 2010)
a) 25%
b) 50%
c) 75%
d) 100%
2. The resolution of compound microscope can be enhanced by using
a) light of shorter wavelength
b) light of long wavelength
c) light of variable wavelength
d) smaller numerical aperture
3. A child had difficulty in breathing and was suspected of having severe asthma. An elevated number of which cells in a routine blood panel might support this diagnosis?
a) Eosinophils
b) Monocytes
c) Basophils
d) Neutrophils
4. N acetylmuramic acid is a component of
a) Bacterial cellwall
b) Fungal cell wall
c) Chloroplast membrane
d) Mitochondrial membrane
5. In a eukaryotic chromosome, DNA replication is initiated at
a) centromere and continues towards the telomere
b) multiple points all along the DNA
c) centromer and telomere
d) telomere and continues towards the centromere
6. The linkage found between sugar and base in RNA and DNA is
a) ester
b) O glycosidic
c) N glycosidic
d) phosophodiester
7. Which of the following does not participate in the formation of antigen antibody complex?
a) Hydrophobic bond
b) Covalent bond
c) Hydrogen bond
d) Electostatic interaction
8. Which is true of bacteria?
a) Bacteria lack DNA
b) Mitochondria and nuclear membrane are present
c) RNA acts as genetic material
d) Nuclesoid is the region which contains DNA
9. Staphlococcus aureus is a skin pathogen and produces coagulase enzyme that clots fibrinogen in plasma. This result in
a) lysis of the pathogen
b) lysis of phagocytes
c) rapid spread of the pathogen
d) protection of the pathogen from phagocytosis
10. Euglenoids are unique among the algae because of their ability
a) to produce lipids
b) to produce carbondioxide
c) to practice photosynthesis
d) to synthesise proteins
Answers
1. b) 50%
2. a) light of shorter wavelength
3. a) Eosinophils
4. a) Bacterial cellwall
5. b) multiple points all along the DNA
6. c) N glycosidic
7. b) Covalent bond
8. d) Nuclesoid is the region which contains DNA
9. d) protection of the pathogen from phagocytosis
10. b) to produce carbondioxide