Practice Questions

TLS Online TPP Program

#Question id: 4126

Which one of the following is true about the genetic code?

#Section 3: Genetics, Cellular and Molecular Biology

All codons recognized by a given tRNA encode different amino acids.
It is absolutely identical in all living things.
Several different codons may encode the same amino acid.
The base in the middle position of the tRNA anticodon sometimes permits “wobble” base pairing with 2 or 3 different codons.

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TLS Online TPP Program

#Question id: 601

#Section 2: General Biology

In a ping-pong reaction which does not occur?

TLS Online TPP Program

#Question id: 602

#Section 2: General Biology

An inhibitor binds to a site other than the active site of the enzyme. Which statement below correlates with this observation?

TLS Online TPP Program

#Question id: 603

#Section 2: General Biology

Nonclassical competitive inhibition involves ________.

TLS Online TPP Program

#Question id: 604

#Section 2: General Biology

An enzyme is irreversibly inhibited by diisopropylfluorophosphate (DFP). What does this show?

TLS Online TPP Program

#Question id: 605

#Section 2: General Biology

Which statement is false about allosteric regulation?

TLS Online TPP Program

#Question id: 606

#Section 2: General Biology

Which statement is false about regulatory enzymes that are controlled allosterically?