Question

1. Which of the following statements about transcription and DNA replication in living cells is/are NOT true? Note: This question is NOT including the process of reverse transcription.

	A.	In both transcription and replication, synthesis is in the 5'-3' direction.
	B.	Both transcription and DNA replication require an RNA primer.
	C.	Transcription uses ribonucleotides while DNA replication uses deoxynucleotides.
	D.	Transcription involve a DNA sequence known as the promoter, while in DNA replication, DNA polymerase binds the origin of replication to begin DNA synthesis.
	E.	two of the above statements are NOT correct

2. At which stage  or stages of meiosis must a non-disjunction event have occurred if you have the following four gametes at the end?

n

n

n-1

n+1

	A.	MI
	B.	non-disjunction cannot generate these gametes
	C.	MI or MII
	D.	MII

3. The idea of summation is important for which of the following processes?

	A.	action potentials
	B.	ESPSs
	C.	exocytosis
	D.	B and C
	E.	A, B, and C

Answer 1

Question

1. The incorrect statements are :

I. Both replication and transcription require RNA primer: this statement is false as RNA primer are required only in DNA replication.

II.  Transcription uses ribonucleotides while DNA replication uses deoxynucleotides: this is false as DNA replication uses both ribonucleotides and deoxyribonucleotides. On the other hand, transcription only require ribonucleotides.

Hence, option E is correct.

2..The non-separation of homologous chromosome during meiosis result in producing these gametes. Hence, option a is correct.

3. The idea of summation is important for generating action potential. Hence, option a is correct.