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BCS 1010 EXAM 3 QUESTIONS AND ANSWERS RATED A.
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BCS 1010 EXAM 3 QUESTIONS AND ANSWERS RATED A.
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BCS 1010 EXAM 3 QUESTIONS AND ANSWERSRATED A.
Origin of replication provides an opening called a ___ __ that forms 2
replication forks
Correct Answer -replication bubble
Bacteria have ____ ___ of replication
Correct Answer -single origin
Eukaryotes have ___ ____ of replication
Correct Answer -multiple origins
DNA helicase
Correct Answer -binds to DNA and travels 5' to 3' using ATP to separate
strand and move fork forward
DNA topoisomerase
Correct Answer -relives additional coiling ahead of replication fork
single strand binding proteins
Correct Answer -keep parental strands open to act as templates
DNA polymerase III
Correct Answer -covalently links nucleotides in a 5' to 3' direction on
growing strand only
,DNA primase is needed for DNA replication
Correct Answer -DNA polymerase cannot begin synthesis on a bare
template strand
DNA primase
Correct Answer -makes the primer from RNA
RNA primer is removed and replaced with _____
Correct Answer -DNA polymerase I
DNA ligase
Correct Answer -catalyzes the creation of a covalent bond between the 2
DNA fragments
leading strand
Correct Answer -DNA synthesized in as one long molecule
lagging strand
Correct Answer -DNA synthesized 5' to 3' but okazaki fragments
Okazaki fragments
Correct Answer -consist of RNA primers plus DNA
in both leading and lagging strand
Correct Answer -RNA primers are removed by DNA polymerase I and
replaced with DNA, DNA ligase joins adjacent DNA fragments
, Hydrogen bonding between A-T and G-C is needs to be ___ and ___
Correct Answer -accurate and stable
DNA polymerase III can proofread to remove ____ pairs
Correct Answer -mismatched
telomeres
Correct Answer -series of short nucleotide sequences repeated at the ends
of chromosomes in eukaryotes
telomere at 3' does not have complementary strand and is called a ___
____
Correct Answer -3' overhand
telomerase
Correct Answer -attatches many copies of DNA repeat sequence to the
ends of chromosomes
telomerase is linked to 99% of ____
Correct Answer -all types of human cancers
what things are required for photosynthesis and what things are produced
by photosynthesis
Correct Answer -plants need to have light energy, carbon dioxide and
water. photosynthesis produces a compound that is just like glucose
(C6H12O6), oxygen and water
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