Multiple Choice QuestionsElectron microscope is based on the principle of
electromagnetic theory
resolution of glass lenses
magnification of glass lenses
refraction of light
Lichens are described as indicator of
air pollution
water pollution
soil pollution
agriculture productivity
Which one of the following viruses contains is a DNA and RNA?
Cyanophage
Herpes virus
Leuko virus
Polio virus
C.
Leuko virus
We all know that all cells have double-stranded DNA as their genetic material. But, in contrast, all viruses possess either DNA or RNA as their genetic material, and it can be either single-stranded or double-stranded. However, there is a third group of viruses that use both DNA and RNA as their genetic material but at different stages of their reproductive cycle. This third group is examplified by retroviruses which contain RNA as genetic material but replicate through a DNA intermediate, and hepadnaviruses (human hepatitis-B virus) which contains DNA as in replication genetic material but has an RNA intermediate.
Identify the correct sequence of events in the viral replication process.
I. Eclipse
II. Maturation
III. Adsorption
IV. Assembly
V. Penetration
VI. Lysis
I, II, III, IV, V, VI
II, I, III, IV, V, VI
III, V, I, II, IV, VI
III, V, VI, IV, II, I
Match the items in column I with those in Column II and choose the correct answer.
| Column I | Column II |
| A. Blue- green algae as biofertilizer | 1. Ectomycorrhiza |
| B. Fungi as biofertilizer | 2. Thiobacillus sp. |
| C. Free living nitrogen fixing bacteria | 3. Anabaena sp. |
| D. Phosphate solubilizing bacteria |
4. Clostridium sp. 5. Azospirillium sp. |
A- 3; B- 1; C- 5; D- 2
A- 5; B- 1; C- 2; D- 4
A- 5; B- 4; C- 1; D- 2
A- 4; B- 2; C- 4; D- 2
lsogamous condition with non-flagellated gametes is found in
Chlamydomonas
Spirogyra
Volvox
Fucus
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