It is possible to convert the Cys that is a part of Cys-tRNACys to Ala by a catalytic reduction.  If the resulting Ala-tRNACys were added to a mixture of (1) ribosomes, (2) all the other tRNAs and amino acids, (3) all of the cofactors and enzymes needed to make protein in vitro, and (4) mRNA for hemoglobin, where in the newly synthesized hemoglobin would the Ala from Ala-tRNACys be incorporated?

TLS Online TPP Program

#Question id: 20002

#Unit 12. Applied Biology

proBA and proC in E. coli

TLS Online TPP Program

#Question id: 5569

#Unit 5. Developmental Biology

What makes sexually reproduced offspring genetically different from their parents?

TLS Online TPP Program

#Question id: 201

#Unit 1. Molecules and their Interaction Relevant to Biology

The product(s) of lactate dehydrogenase under anaerobic conditions is (are)

A) pyruvic acid.

B) NAD+.

C) NADH.

TLS Online TPP Program

#Question id: 26931

#Unit 10. Ecological Principles

Resource separation ratio d/w= 1<d/w<3 represent,

TLS Online TPP Program

#Question id: 15658

#Unit 13. Methods in Biology

You are studying a new strain of E. coli that can utilize the disaccharide melibiose very efficiently. You find that utilization depends on the enzyme melibiase, which is encoded by the gene Mel1. Mel1 is not expressed unless melibiose is present in the growth medium.

Next, you isolate a third mutant, MelC–, which gives constitutive melibiase expression. The MelC– mutation is closely linked to Mel1 and MelB–. Genetic tests of the MelC– mutation yield the following:

 

As above, classify the MelC– mutation in terms of its basic genetic properties and explain how you arrived at your conclusions.