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BIOL 1543- Final Exam Guide - Comprehensive Notes for the exam ( 34 pages long!)

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limesea-lion581
29 Mar 2018
School
University of Arkansas
Department
Biology
Course
BIOL 1543
Professor
John Chadwick

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Document Summary

2. 8, 5, 23, 24, 25: cell division and dna structure. 4 main di erences: dna has 2 strands while rna has 1, dna is shaped like a helix while rna is not, 4 bases (actg) rna has u (t, dna uses deoxyribose while rna uses ribose. Dna- this is where it"s at yo gucci. Cytosine and thymine are a family-pyrimidine (they all have y) Interphase: majority of cells life- growing and dividing and growing. G1,s,g2- stages of interphase! (g- growth, s- synthesis) S: synthesis: making a dna copy (consider s as a cycle) Think of it as a cycle: starts with s- g2- mitosis (m)- g1. Stops: g0, g1,g2, m- stops cell to make sure it isn"t messed up so they can get rid of it before it is fully grown! Not s: so then it doesn"t make a copy of a messed up cell and waste 2 cells. G1: check to see if the dna is damaged during (g1).

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Related Questions

QUESTION 1. Compared to eukaryotic genomes, only prokaryotic genomes:

A. contain DNA organized by histones.
B. contain usually one, circular chromosome.
C. contain plasmid DNA.
D. have chromosomes contained in a nucleus.

QUESTION 2. Azathioprine is a drug that may be prescribed to transplant recipients to reduce the chance of tissue rejection reactions. In its active state, it acts as a purine analogue, inhibiting DNA biosynthesis. This means that 6-mercaptopurine will be inserted in place of a purine containing nucleotides during DNA replication. Given this drug's mode of action, you would expect it to be incorporated into DNA in place of:

A. nucleotides containing guanine or cytosine.
B. nucleotides containing adenine or thymine.
C nucleotides containing adenine or guanine.
D. nucleotides containing guanine nucleotide or uracil.

QUESTION 3. RNA is distinguished from DNA because only RNA:

A. typically exists as a single-stranded molecule.
B. has a 3' to 5' directionality.
C. is composed of nucleotides that contain the sugar deoxyribose.
D. is composed of nucleotides that contain the nitrogen bases T, C, G, and A.

QUESTION 4. How are RNA nucleotides different from DNA nucleotides? To be marked correct, you'll need to select all true statements, as there may be more than one correct answer.

A. RNA nucleotides do not contain thymine.
B. RNA nucleotides use the sugar ribose, while DNA nucleotides do not.
C. RNA nucleotides lack phosphate.
D. RNA nucleotides incorporate pyrimidine nitrogen bases, while DNA nucleotides only incorporate purine nitrogen bases.