BIO105 Ch.15 Test Questions & 100% Correct Answers 2024/25 Version
3 views 0 purchase
Course
BIO105
Institution
BIO105
What is the function of DNA polymerase III? - to add nucleotides to the end of a growing
DNA strand
What is the function of topoisomerase? - relieving strain in the DNA ahead of the replication fork
Which of the following covalently connects segments of DNA?
primase
DNA polymerase III
DNA pol...
BIO105 Ch.15 Test Questions & 100%
Correct Answers 2024/25 Version
What is the function of DNA polymerase III? - ✔✔to add nucleotides to the end of a growing
DNA strand
What is the function of topoisomerase? - ✔✔relieving strain in the DNA ahead of the replication fork
Which of the following covalently connects segments of DNA?
primase
DNA polymerase III
DNA polymerase I
ligase
helicase - ✔✔ligase
Which of the following help(s) to hold the DNA strands apart while they are being replicated? -
✔✔single-strand DNA binding proteins
You briefly expose bacteria undergoing DNA replication to radioactively labeled nucleotides. When you
centrifuge the DNA isolated from the bacteria, the DNA separates into two classes. One class of labeled
DNA includes very large molecules (thousands or even millions of nucleotides long), and the other
includes short stretches of DNA (several hundred to a few thousand nucleotides in length). These two
classes of DNA probably represent - ✔✔leading strands and Okazaki fragments.
Which of the following synthesizes short segments of RNA? - ✔✔primase
Mendel and Morgan did not know about the structure of DNA; however, which of the following of their
contributions was (were) necessary to Watson and Crick? - ✔✔the particulate nature of the
hereditary material
Put the following steps of DNA replication in chronological order.
, 1. Single-stranded binding proteins attach to DNA strands.
2. Hydrogen bonds between base pairs of antiparallel strands are broken.
3. Primase binds to the site of origin.
4. DNA polymerase binds to the template strand.
5. An RNA primer is created. - ✔✔2, 1, 3, 5, 4
Suppose you are provided with an actively dividing culture of E. coli bacteria to which radioactive
thymine has been added. What would happen if a cell replicates once in the presence of this radioactive
base? - ✔✔DNA in both daughter cells would be radioactive
To repair a thymine dimmer by nucleotide excision repair, in which order do the necessary enzymes act?
- ✔✔endonuclease, DNA polymerase I, DNA ligase
Which of the following statements describes the eukaryotic chromosome?
A) It is composed of DNA alone.
B) The nucleosome is its most basic functional subunit.
C) The number of genes on each chromosome is different in different cell types of an
organism.
D) It consists of a single linear molecule of double-stranded DNA.
E) Active transcription occurs on heterochromatin. - ✔✔D) It consists of a single linear molecule
of double-stranded DNA.
Researchers found E. coli that had mutation rates 100 times higher than normal. Which of the following
is the most likely cause of these results? - ✔✔The proofreading mechanism of DNA polymerase was
not working properly.
What determines the nucleotide sequence of the newly synthesized strand during DNA replication? -
✔✔the nucleotide sequence of the template strand
What is a telomere? - ✔✔the ends of linear chromosomes
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller KenAli. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.99. You're not tied to anything after your purchase.
