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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?
TLS Online TPP Program
#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
TLS Online TPP Program
#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 |
TLS Online TPP Program
#Question id: 40241
#Botany
Read the following statements regarding beverage plants:
Statement I: Commercial tea is obtained from the processed leaves of Camellia sinensis, which belongs to the family Theaceae.
Statement II: Coffee is obtained from the roasted seeds of Coffea arabica, which belongs to the family Euphorbiaceae.
Choose the correct answer from the options given below:
TLS Online TPP Program
#Question id: 40242
#Botany
Match List-I with List-II
| LIST-I (Botanical Name) | LIST-II (Economically Useful Part) |
| A. Crocus sativus (Saffron) | I. Dried rhizome |
| B. Syzygium aromaticum (Clove) | II. Dried stigmas and tops of styles |
| C. Curcuma longa (Turmeric) | III. Dried oleo-gum-resin |
| D. Ferula assa-foetida (Hing) | IV. Dried unopened flower buds |
Choose the correct answer from the options given below:
TLS Online TPP Program
#Question id: 40243
#Botany
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Cotton fibers are considered surface fibers rather than bast fibers.
Reason (R): Cotton fibers originate as epidermal elongations of the seed coat, whereas bast fibers are derived from the phloem tissues of the stem.
In the light of the above statements, choose the most appropriate answer from the options given below: