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Semester Review Life Science 5
Test Description: Spring 2013--Part 5 of 6
Instructions: Answer all questions to get your test result.
1) The backbone of DNA consists of ______.
A
nitrogenous bases
B
a repeating sugar-nucleotide-sugar-nucleotide pattern
C
paired nucleotides
D
a repeating sugar-phosphate-sugar-phosphate pattern
2) In a DNA double helix, adenine pairs with ______ and guanine pairs with ______.
A
cytosine... thymine
B
thymine... cytosine
C
guanine... adenine
D
uracil... cytosine
3) If one strand of a DNA double helix has the sequence GTCCAT, what is the sequence of the other strand?
A
TGAACG
B
CAGGTA
C
CAGGUA
D
ACTTGC
4) Who discovered the structure of DNA?
A
Franklin
B
Hershey and Chase
C
Pauling
D
Watson and Crick
5) Evidence for the spiral nature of DNA came from ______.
A
studies of disease-causing bacteria by Griffith
B
base rule studies by Chargaff
C
X-ray crystallography studies by Rosalind Franklin
D
bacteriophage studies by Hershey and Chase
6) What type of chemical bond joins the bases of complementary DNA strands?
A
hydrophilic
B
hydrogen
C
ionic
D
covalent
7) Nucleosomes are made of ______________________________________.
A
DNA
B
RNA and protein
C
DNA and histone proteins
D
proteins
8) Cells function as many types. Some of these cells function as liver cells, muscle cells, red blood cells. What is this process called?
A
carcinogenesis
B
gene expression
C
cellular differentiation
D
regeneration
9) The human genome contains approximately ______ genes.
A
50,000-60,000
B
21,000
C
1,000-2,000
D
2,000-3,000
10) The Human Genome Project has the potential to ______.
A
increase our understanding of the historical relationships among species
B
lead to treatments for contagious diseases
C
lead to treatments for inherited diseases
D
play a role in all of the choices listed here
*select an answer for all questions
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