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Bio 156 exam 3 with correct answers
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Bio 156 exam 3 with correct answers
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Bio 156 exam 3 with correct answersDNA contains - Answer -deoxyribose, phosphate, nitrogenous base
Deoxyribose - Answer -five-carbon sugar that is a component of DNA nucleotides
nitrogenous base - Answer -AGCT -
A - adenine
G - Guanine
C - Cytosine
T - Thymine
Structure of DNA - Answer -Two nucleotides w/ purine bases
*Adenine
*Guanine
Two nucleotides with pyrimidine bases
*Thymine
*Cytosine
Chargaff's Rules - Answer -DNA - Adenine always pairs with Thymine & Guanine
always pairs with Cytosine
Watson & Crick - Answer -Discovered DNA 1953 & came up with the term Double Helix
for DNA
Double Helix - Answer -two strands of nucleotides wound about each other; structure of
DNA
Rosalind Franklin - Answer -discovered the X-ray of DNA
DNA Replication - Answer -Two daughter DNA molecules, each consisting of one old
strand and one new strand. The parental DNA untwists as its strands separate, and the
daughter DNA rewinds as it forms.
DNA polymerases - Answer -Enzyme that Connects Nucleotides together during DNA
replication - involved in repairing DNA
, Complementary base pairing make DNA replication possible by - Answer -Two strands
of the double helix separate, each serves as a template on which nucleotides can be
arranged by specific base pairing into new complementary strands.
semi-conservative replication - Answer -One original strand is conserved in each
daughter molecule
Prokaryotic Replication - Answer -bacteria have a single circular loop, moves around
the circular DNA in both directions, produces identical circles, cell divides between
circles,as fast a every 20 min
Eukaryotic Replication - Answer -begins at numerous points along linear chromosome,
DNA unwinds and unzips into two strands, Each old strand of DNA serves as a template
for a new strand, base pairing forms new strand, bubbles spread bi-directionally until
they meet
DNA provides instruction to - Answer -a cell and and organism as a whole
Gene - Answer -a segment of DNA that specifies the sequence of amino
acids/enzymes, in a polypeptide,
Genotype - Answer -genetic makeup, the sequence of nucleotide bases in DNA
Phenotype - Answer -organisms physical traits which arise from the actions of a wide
variety of proteins
RNA - Answer -a polymer of nucleotides
4 types of RNA nucleotides - Answer -A - adenine
U - Uracil
G - Guanine
C - Cytosine
RNA strand - Answer -single
DNA strand - Answer -Double
What are the similarities and differences of DNA and RNA? - Answer -Both are
polymers of nucleotides. In RNA the sugar is Ribose, DNA the sugar is deoxyribose.
Both RNA & DNA have the bases A, G & C, DNA has T and RNA has U
Transcription - Answer -copying sequence of DNA into RNA
Translation - Answer -is copying RNA to Protein, an mRNA transcript migrates to rough
endoplasmic reticulum
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