Which of the following can be made into crystal?
(a) A Bacterium
(b) An Amoeba
(c) A Virus
(d) A Sperm
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What is the number of endospores formed in a bacterium at a time?
An endospore is a dormant, tough, and non-reproductive structure produced by certain bacteria from the Firmicute phylum. Endospore formation is usually triggered by lack of nutrients, and usually occurs in...
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A feature of reproduction that is common to Amoeba, Spirogyra and Yeast is that
(a) they reproduce asexually
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A real crystal has more entropy than an ideal crystal. Why?
A real crystal has some disorder due to presence of defects whereas ideal crystal has no disorder.
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Which bacterium causes peptic ulcers? Who discovered the above pathogen for the first time?
(i) Helicobactor pylori (ii) Marshall and Warren
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Match the following A and B (a) Smooth endoplasmic reticulum (i) Amoeba
a—iv; b—v; c—iii; d—i; e—ii
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Classify the following into osmosis/diffusion (a) Swelling up of a raisin on keeping in water. (b) Spreading of virus on sneezing.
(a) Osmosis (b) Diffusion (c) Osmosis (d) Osmosis (e) Osmosis (f) Diffusion (g) Diffusion
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How has the bacterium Bacillus thuringiensis helped us in controlling caterpillars of insect pests
Bacillus thuringiensis products are endotoxin which when ingested and released in the gut of the larvae of insect pest disrupts the insect gut lining thereby killing them.
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The method of directly injecting a sperm into ovum in assisted by reproductive technology is called:
c.The method of directly injecting a sperm into ovum in assisted by reproductive technology is called ICSI.
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In virus-infected plants the meristematic tissues in both apical and axillary buds are free of virus because
c. the cell division of meristems are faster than the rate of viral multiplication
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The transfer of genetic material from one bacterium to another through the mediation of a vector like virus is termed as:
a. Transduction
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