Question

The preparatory phase of glycolysis converts one 6-carbon sugar into two 3-carbon sugars and uses two molecules of ATP while the payoff phase of glycolysis converts those two 3-carbon sugars into 2 molecules of pyruvate and generates two molecules of NADH and four molcules of ATP.

True

False

Which of the following best characterizes the termination of transcription?

		The sequence signals for termination of transcription are contained within the transcript itself.
		The transcriptional termination sequence is a site in the DNA approximately 30 base pairs downstream of the actual termination point.
		Transcription terminates when the polymerase reaches the promoter of the adjacent downstream gene.
		Transcription terminates when the polymerase reaches the start codon of the adjacent downstream gene.

Which of the following best describes the TATA box?

		It is a sequence in the promoter region of genes that marks transcription start sites.
		It is a sequence in chromosomes that marks replication origins.
		It is a sequence in primary transcripts that marks cleavage and polyadenylation sites.
		It is a sequence in mRNAs that marks translation start sites.

De novo fatty acid synthesis is primarily regulated by phosphorylation of acetyl-CoA carboxylase, which is stimulated by glucagon and/or epinepherine.

True

False

Answer 1

1. The preparatory phase of glycolysis converts one 6-carbon sugar into two 3-carbon sugars and uses two molecules of ATP while the payoff phase of glycolysis converts those two 3-carbon sugars into 2 molecules of pyruvate and generates two molecules of NADH and four molcules of ATP. True

​​​2. Which of the following best characterizes the termination of transcription?

Answer: The sequence signals for termination of transcription are contained within the transcript itself.

Here is a long strech of adenine bases in the template DNA.

Moreover a protein called Rho factor helps in the termination of the transcription.

Other option are incorrect as,

Transcription cannot terminate on reaching the promotor or start codon of the next gene because genes sometimes bare overlaping.

3. Which of the following best describes the TATA box?

​​​Answer: It is a sequence in the promoter regio: It is a sequence in the promoter regionn of genes that marks transcription start sites.

Other options ade incorrect.

Replication starting site of chromosome is called Origin of Replication.

Cleavage and polyadenylation site is called termination site.

Sequence in mRNA that marks start site of translation is the initiation Codon, AUG or GUG.

4. False

because epinephrine and glucogon are released inyo the blood at the time of high energy demand, where as fatty acid synthesis occurs when body has enough energy supplies and less are needed.