26. The total compaction of DNA as seen in metaphase chromosomes is approximatel
ID: 3165531 • Letter: 2
Question
26. The total compaction of DNA as seen in metaphase chromosomes is approximately fold. ?. 10,000 B.50,000 C. 100,000 D. 40 E. 4 27. With regard to the typical human cell, which of the following appears to be true? A. There is only one origin of replication. B. There are multiple origins of replication that function consecutively. C. There are multiple origins of replication that function simultaneously. D. Replication is not understood well enough to postulate on replication origins. E. The number of origins varies with the level of gene expression. 28. The 10,000 origins of replication in mammalian cells suggests that concerning origin of replication there is A. at least one per loop of DNA. B. probably one every other loop of DNA. C. a random distribution across the genome. D. a precise pattern of distribution relative to other replication points. E. approximately one per chromosome 29. Which of the following is not true about DNA polymerase? A. It cannot begin the 5' end of a new strand without a primer. B. It can only travel in the 5' to 3' direction. C. It can reconstruct the 3' end of each newly made DNA strand. D. It can replace RNA primer with DNA at the 5' end. E. It is an enzyme.Explanation / Answer
Answer:
26). A. 10, 000
27). C. There are multiple origins of replication that function simultaneously.
Explanation:
At the nuclear level, a coordinated activation of origins has been observed, leading to the formation of replication foci, which depending on their timing of activation in the S phase, occupy distinct nuclear territories. It is believed that each foci contain hundreds of origins that are simultaneously activated in a replication factory
28). A). at least one per loop of DNA.
29). D. It can replace RNA primer with DNA at the 5' end.
Explanation:
DNA polymerase adds nucleotide from 5’ end of the DNA. But the enzyme needs primes.
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