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Bio 111 Exam 6 Questions And 100% Correct Answers Graded A+
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Bio 111 Exam 6 Questions And 100% CorrectAnswers Graded A+
Griffith's experiment What occurred in this experiment? What was the outcome? Answer
4 experiments on rats; 1- live/rough = live 2- live/smooth=dead 3- dead/smooth=live 4-
live/rough & dead/smooth=dead Result=DNA transformed into live/smooth
Transformation Answer a permanent genetic change to DNA
3 parts of nucleotide Answer Sugar and phosphate backbone
Nitrogenous base
Watson and Crick's contribution to understanding DNA: - Answer They compiled all the
data previously done on DNA, and created a model of it to show the structure of
Franklin and Wilkin's contribution to understanding DNA: - Answer Franklin: used x-ray
diffraction to show an array of DNA. Wilkins??????
Direction in which strands of DNA run - Answer DNA runs from 5' to 3'
Where are triplets, codons, and anticodons found? What are they? -Answer Triplets The
sequence of amino acid in a protein determines its structure and function. Triplets is a
group of three base and are found in DNA. Codons are found in mRNA. A codon is a
sequence of three DNA or RNA nucleotides that corresponds with a specific amino acid
or stop signal during protein synthesis. Anticodons are found in tRNA. Anticodons are a
sequence of three nucleotides in a region of transfer RNA that recognizes a
complementary coding triplet of nucleotides in messenger RNA during translation by
the ribosomes in protein synthesis.
Which nitrogenous bases are purines? Pyrimidines? What is the difference between a
, purine and pyramidine? - Answer Purines are double rings which are Adenine and
Guanine. Pyrimidines are single rings which are Cytosine and Thymine.
Where does DNA replication take place? -Answer Nucleus
Helicase -Answer breaks hydrogen bonds between the nitrogenous bases
DNA polymerase -Answer add complementary bases 5' → 3'
Leading strand -Answer grows toward replication fork, continuous
Lagging strand -Answer grows away from replication fork, forming okazaki fragments
which are connected by DNA ligase
Okazaki fragments -Answer spaces between the already paired new strand of DNA on
the lagging strand
Ligase-Answer the "glue"
Complementary base pairing-Answer A-T, G-C
Semiconservative replication-Answer each double helix consists of one old and one
newly synthesized strand
What are telomeres?-Answer caps, sequence of bases we find on the end of
chromosomes; they make sure all important genetic information can be replicated
Telomerase is an enzyme that can extend the telomere by adding repeating nucleotides
sequences to the ends of chromosomes
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