TLS Online TPP Program

#Question id: 559


In competitive inhibition, an inhibitor:

#Biochemistry
  1. binds at several different sites on an enzyme.

  2. binds covalently to the enzyme.

  3. binds only to the ES complex.

  4. binds reversibly at the active site.

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TLS Online TPP Program

#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?

TLS Online TPP Program

#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: