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TN 12th Computer Applications மின்னணு தரவு பரிமாற்றம் Sample Question Papers Study Material - QB365 Set A

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TN 12th Computer Applications மின்னணு செலுத்தல் முறைகள் Sample Question Papers Study Material - QB365 Set A

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TN 12th Computer Applications மின் - வணிகம் Sample Question Papers Study Material - QB365 Set A

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TN 12th Computer Applications திறந்த மூல கருத்துருக்கள் Sample Question Papers Study Material - QB365 Set A

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12th Standard English Medium Biology (Botany) Subject Principles and Processes of Biotechnology Creative 2 Mark Questions with Solution Part - II updated Creative Questions

Published on: 13/05/2022

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Std: 12th Standard - Biology

chapter: - Creative Questions

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Questions:

Generic 2

5 x 2 = 10

Golden rice is a bio-fortified rice developed by rDNA technology. It differs from its parental strain by possessing 'psy' gene, 'crt-l' gene and 'lyc' gene which are responsible for beta - carotene synthesis.
(a) Name the sources of the above mentioned genes.
(b) Which disease can be controlled / prevented if a person's diet bas golden rice?

What are polylinkers?

Write the chemistry of biological hydrogen production by algae

Name any two fungal and algal species used as SCP.

Define fermentation.

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Answers Key:

Generic 2

5 x 2 = 10

(a) 'psy' gene is obtained from Daffodil plant (Narcissus pseudonarcissus).
(i) 'crt-l ' gene is from Erwinia uredovora bacterium.
(ii) 'lyc' gene is from wild-type rice endosperm.
(b) Golden rice can control Xerophthalmia.

Mostly cloning vectors have more than one restriction sites. These are called as Multiple Cloning Site (MCS) or polylinkers. Presence of MCS facilitates the use of restriction enzyme of choice.

(i) The biological hydrogen production with algae is a method of photo biological water splitting.
(ii) In normal photosynthesis the alga, Chlamydomonas reinhardtii releases oxygen.
(iii) When it is deprived of sulfur, it switches to the production of hydrogen during photosynthesis and the electrons are transported to ferredoxins.
(iv) [Fe]-hydrogenase enzymes combine them into the production of hydrogen gas.

(1) Agaricus campestris
(2) Saccharomyces cerevisiae

Fermentation refers to the metabolic process in which organic molecules (normally glucose) are converted into acids, gases, or alcohol in the absence of oxygen or any electron transport chain with oxygen.