It has been observed that organisms on islands are different from, but closely related to, similar forms found on the nearest continent. This is taken as evidence that

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#Question id: 40235

#Applied Microbiology

Match the reagent with its specific role in vertical gel electrophoresis:

List-I (Reagent)	List-II (Function)
(A). Glycerol	(I). Catalyst for polymerization
(B). Ammonium Persulfate (APS)	(II). Increases sample density for loading
(C). Glycine	(III). Provides buffering ions in the running buffer
(D). Polyacrylamide	(IV). Acts as the supporting matrix (sieve)

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#Question id: 40236

#Botany

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A): The roots of Rauvolfia serpentina are used effectively in the treatment of hypertension (high blood pressure).

Reason (R): The plant contains the indole alkaloid Reserpine, which acts on the nervous system to lower blood pressure

In the light of the above statements, choose the most appropriate answer from the options given below:

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#Question id: 40237

#Applied Microbiology

Which of the following groups of scientists is credited with the discovery of restriction enzymes, the "molecular scissors" essential for genetic engineering?

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#Question id: 40238

#Applied Microbiology

Consider the following statements regarding pioneer microbiologists:

• Statement I: Sergei Winogradsky developed the enrichment culture technique to isolate specific microorganisms.

• Statement II: Martinus Beijerinck was the first person to isolate a nitrogen-fixing bacterium, Clostridium pasteurianum.

Which of the following is correct?

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#Question id: 40239

#Applied Microbiology

Assertion (A): The experiments conducted by Beadle and Tatum on Neurospora crassa were pivotal in establishing the field of biochemical genetics.

Reason (R): Their work led to the formulation of the "one gene-one enzyme" hypothesis, which directly linked genes to the production of specific proteins (enzymes).

Choose the correct option

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#Question id: 40240

#Applied Microbiology

Match the scientist(s) in Column A with their contribution in Column B.

Column A (Scientist)	Column B (Contribution)
(P) Beadle and Tatum	(i) Chemolithotrophy and nitrogen fixation
(Q) Martinus Beijerinck	(ii) Discovery of restriction endonucleases
(R) Sergei Winogradsky	(iii) One gene-one enzyme hypothesis
(S) Arber, Nathans, and Smith	(iv) Coined the term "virus" and enrichment culture