Trophic level in a food chain which cycles the various materials between environment and living organisms is constituted by:
Condensation of chromosomes occurs in
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Solution
Condensation of chromosomes occurs in the prophase- I.After that chromosome moves toward the poles.
Which of the following is non-enzymatic phosphorylation?
Internal fertilization occurs in-
All of the following statements concerning the Actinomycetes filamentous soil bacterium Frankia are correct except that Frankia :
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Solution
Frankia, is a nitrogen fixing mycelial bacterium which is associated symbiotically(and not free living) with the root nodules of several non legume plants.
Which two of the following changes (a – d) usually tend to occur in the plain dwellers when they move to high altitudes(3,500 m or more)?
(1)Increase in red blood cell size
(2)Increase in red blood cell production
(3)Increased breathing rate
(4)Increase in thrombocyte count
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Solution
At high altitude, the body undergoes numerous changes in order to increase oxygen delivery to cells and improve the efficiency of oxygen usage. The early changes include increased breathing rate and increased red blood cell production.
Biosystematics aims at
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Solution
Biosystematics is the study of diversity of organism and all their comparative and evolutionary relationships.
When the receptor of a TH cell binds to a pathogen being presented on a macrophage it
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Solution
When the TH cell binds antigen being presented on a macrophage, it secretes cytokines which activate itself and B cells.
Which of the following diasaccharide gives two molecules of glucose on hydrolysis ?
Pedicellate flowers arising from a single point form –
Scutellum is present in the embryo of
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Solution
Single cotyledon of grass embryo is called scutellum.
Pseudostratified columnar epithelium is found in
What type of human population is represented by the following age pyramid?
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Solution
This age pyramid represents the declining population of any organism. Population decline is the reduction overtime in region’s census. It can be caused for several reasons that includes heavy immigration disease, famine or sub-replacement fertility.
Most of eubacterial antibiotics are obtained from
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Solution
Bacillus subtilis is used to extract antibiotics substilin or Bacitracin.
A phosphoglycerate is always made up of :
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Solution
A saturated or unsaturated fatty acid esterified to aglycerol molecule to which a phosphate group is also attached forms phosphoglycerides.
Phosphoglycerides are major structural components of cell membranes. They are,therefore,also called membrane lipids. Lecithin is one example.
Kidney crystals are solid clusters of
Resin canals and mucilage canal of gymnosperms are example of-
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Solution
Resin canals and mucilage canal of gymnosperms are example of lysigenous cavity.
AIDS day is:
Which one of the following hydrolyses internal phosphodiester bonds in a polynucleotide chain?
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Solution
Endonucleases hydrolyse internal phosphodiester bonds in a polynucleotide chain (i.e.,DNA). While exonucleases hydrolyse terminal phosphodiester bonds in a polynucleotide chain (i.e.,DNA).