TLS Online TPP Program

#Question id: 4165


Which is true about proofreading activity during the synthesis of aminoacyl-tRNAs?

#Unit 3. Fundamental Processes
  1. Proofreading is accomplished as an amino acid enters the active site of the enzyme. Incorrect amino acids are rejected before any reaction occurs.

  2. Proofreading occurs just after aminoacyl-adenylate formation.

  3. A separate cytosolic proofreading enzyme catalyzes the hydrolysis of incorrect aminoacyl-tRNAs.

  4. No proofreading activity is necessary due to the high level of specificity of all aminoacyl-tRNA synthetases.

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TLS Online TPP Program

#Question id: 5273

#Unit 8. Inheritance Biology

Replica plating

TLS Online TPP Program

#Question id: 5274

#Unit 8. Inheritance Biology

Among the easiest of the mutations to isolate are those which

TLS Online TPP Program

#Question id: 5275

#Unit 8. Inheritance Biology

 The designation his- refers to

TLS Online TPP Program

#Question id: 5276

#Unit 8. Inheritance Biology

Donor Strain ABCDE transformation to   recipient strain abcde. Co-transformation check by using media with different supplement?

Media supplement

Growth

A

B

C

D

E

Yes

-

+

-

+

+

Yes

+

+

-

-

+

Yes

+

-

+

-

+

Yes

+

-

+

+

-

Yes

What is a order of gene ?

TLS Online TPP Program

#Question id: 5277

#Unit 8. Inheritance Biology

Deduce the genotype of bacteria strain was shown either growth presents or not in different media?

Media supplement

Minimal

Minimal + Arginine

Minimal + Methionine

Minimal + Arginine+ Methionine

Growth

No

Yes

     No

Yes

TLS Online TPP Program

#Question id: 5278

#Unit 8. Inheritance Biology

What is the co-transduction frequency for the A and B genes, from the following dataset?(Assume that there has been selection for the A+ form of the A gene). Genotype                                Number

 A+B+C+                                   10

 A+B+C-                                    30

A+B-C+                                     20

 A+B-C-                                     40