Class 12 Biology

Amit nagpal

Asked: October 12, 2021In: Class 12 Biology

“Migration may enhance or blurr the effects of selection”. Comment.

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Anurag

Asked: October 12, 2021In: Class 12 Biology

While creation and presence of variation is directionless, natural selection is directional as it is in the context of adaptation. Comment.

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Bhupender

Asked: October 12, 2021In: Class 12 Biology

What is the basic principle of vaccination? How do vaccines prevent microbial infections? Name the organism from which hepatitis B vaccine is produced.

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Arjun dayal

Asked: October 12, 2021In: Class 12 Biology

From which plant are Cannabinoids obtained? Name any two Cannabinoids. Which part of the body is effected by consuming these substances?

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Amit nagpal

Asked: October 12, 2021In: Class 12 Biology

Gene flow occurs through generations. and can occur across language barriers in humans. If we have a technique of measuring specific allele frequencies in different population of the world, can we not predict human migratory patterns in pre-history and history? Do you agree or disagree? Provide explanation to your answer.

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Anurag

Asked: October 12, 2021In: Class 12 Biology

Scientists claim that nascent oxygen is toxic to aerobic life forms. What are the reasons.

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Nirmala

Asked: October 11, 2021In: Class 12 Biology

Do you think that the alternate splicing of exons may enable a structural gene to code for several isoproteins from one and the same gene? If yes, how? If not, why so?

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Picky

Asked: October 11, 2021In: Class 12 Biology

Would it be appropriate to use DNA probes such as VNTR in DNA fingerprinting of a bacteriaphage?

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Avneet Kaur

Asked: October 11, 2021In: Class 12 Biology

A single base mutation in a gene may not ‘always’ result in loss or gain of function. Do you think the statement is correct? Defend your answer.

Class 12 Science Biology Important Questions 12th Science Biology Extra Questions Class 12th Science Session 2022-2023 12th Science Biology Questions Answers

Anita

Asked: October 11, 2021In: Class 12 Biology

What would happen if histones were to be mutated and made rich in amino acids aspartic acid and glutamic acid in place of basic amino acids such as lysine and arginine?

Class 12 Science Biology Important Questions 12th Science Biology Extra Questions Class 12th Science Session 2022-2023 12th Science Biology Questions Answers

Category: Class 12 Biology

“Migration may enhance or blurr the effects of selection”. Comment.

While creation and presence of variation is directionless, natural selection is directional as it is in the context of adaptation. Comment.

What is the basic principle of vaccination? How do vaccines prevent microbial infections? Name the organism from which hepatitis B vaccine is produced.

From which plant are Cannabinoids obtained? Name any two Cannabinoids. Which part of the body is effected by consuming these substances?

Scientists claim that nascent oxygen is toxic to aerobic life forms. What are the reasons.

Do you think that the alternate splicing of exons may enable a structural gene to code for several isoproteins from one and the same gene? If yes, how? If not, why so?

Would it be appropriate to use DNA probes such as VNTR in DNA fingerprinting of a bacteriaphage?

A single base mutation in a gene may not ‘always’ result in loss or gain of function. Do you think the statement is correct? Defend your answer.

What would happen if histones were to be mutated and made rich in amino acids aspartic acid and glutamic acid in place of basic amino acids such as lysine and arginine?

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Category: Class 12 Biology

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