Q401
Open questionHow many pairs of contrasting characters in pea were selected by Mendel?
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Biology GK · all questionsGentics and Evoloution
Gentics and Evoloution
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Q402
Open questionIn proteins the amino acids are linked up by which of the following bonds to form long chains?
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Q403
Open questionDown's syndrome is characterised by
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Q404
Open questionThe frequency of crossing over is
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Q405
Open questionConsider the following statements regarding the formation of micromolecules and choose the correct answer:
1. The molecules which have molecular weight below 100 daltons are called micromolecules
2. According to Miller (1965), most of the glycine and many amino acids were formed from CO2, CO, H2 and NH2 in gaseous state due to electric discharge
3. Purines and pyrimidines are thought to be originated from hydrogen cyanide in the primitive earth due to condensation reactions in the presence of heat or radiations
4. Pyrroles, the probable precursors of porphyrins, were likely formed at a very late stage of chemical evolution due to speculated reaction between ethylene and acetylene
1. The molecules which have molecular weight below 100 daltons are called micromolecules
2. According to Miller (1965), most of the glycine and many amino acids were formed from CO2, CO, H2 and NH2 in gaseous state due to electric discharge
3. Purines and pyrimidines are thought to be originated from hydrogen cyanide in the primitive earth due to condensation reactions in the presence of heat or radiations
4. Pyrroles, the probable precursors of porphyrins, were likely formed at a very late stage of chemical evolution due to speculated reaction between ethylene and acetylene
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Q406
Open questionFormation of root or shoot from the tumour depends on the
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Q407
Open questionIt is believed that, life was restricted to seas alone upto
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Q408
Open questionWho is responsible for the sex determination of a child?
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Q409
Open questionThe one-gene one-enzyme hypothesis was proposed by
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Q410
Open questionDarwin's pangenesis hypothesis assumed that all the organs and perhaps all the cells, in the body of an animal produced miniatures of themselves known as
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Q411
Open questionExperimental evidence of chemical evolution was given by
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Q412
Open questionChromosomes can be counted best in
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Q413
Open questionPower et al were successful in intra and interspecific fusion of the protoplasts of higher plants under the influence of
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Q414
Open questionConsider the following statements regarding the functions of DNA and choose the correct answer:
1. DNA is the genetic material of most organisms
2. It serves for transcription of mRNA
3. It is also capable of reverse transcription
4. It takes part in genetic recombination and has the ability to repair itself
1. DNA is the genetic material of most organisms
2. It serves for transcription of mRNA
3. It is also capable of reverse transcription
4. It takes part in genetic recombination and has the ability to repair itself
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Q415
Open questionConsider the following statements.
1. A colourblind person cannot distinguish red and green.
2. Colour blindness is related with a defect in cone cells.
Which of the statements given above is/are correct?
1. A colourblind person cannot distinguish red and green.
2. Colour blindness is related with a defect in cone cells.
Which of the statements given above is/are correct?
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Q416
Open questionThe existence of photosynthetic organisms about 400 million years after Fig Tree sediments were deposited has been indicated by the occurrence of
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Q417
Open questionConsider the following statements regarding DNA replication and choose the correct answer:
1. The very first requirement of DNA synthesis is the presence of a template or plan along which the new strand is to be constructed
2. The second requirement is of a DNA-dependent-DNA polymerase or simply DNA polymerase enzyme
3. A DNA Pol cannot join two free nucleotides; one of them must be anchored by hydrogen bonds to a DNA strand
4. Replication takes place bidirectionally
1. The very first requirement of DNA synthesis is the presence of a template or plan along which the new strand is to be constructed
2. The second requirement is of a DNA-dependent-DNA polymerase or simply DNA polymerase enzyme
3. A DNA Pol cannot join two free nucleotides; one of them must be anchored by hydrogen bonds to a DNA strand
4. Replication takes place bidirectionally
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Q418
Open questionHomo erectus evolved about 1.7 million yeas ago. They used fire and tools and also used animal hides as clothing. The fossil of homo erectus were named as
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Q419
Open questionWho propounded the theory of evolution?
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Q420
Open questionBy which combination of chromosome, a child will be male?
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