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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
a repeating sugar-nucleotide-sugar-nucleotide pattern
B
nitrogenous bases
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
thymine... cytosine
B
guanine... adenine
C
uracil... cytosine
D
cytosine... thymine
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
ACTTGC
D
CAGGUA
4) Who discovered the structure of DNA?
A
Hershey and Chase
B
Pauling
C
Watson and Crick
D
Franklin
5) Evidence for the spiral nature of DNA came from ______.
A
studies of disease-causing bacteria by Griffith
B
bacteriophage studies by Hershey and Chase
C
base rule studies by Chargaff
D
X-ray crystallography studies by Rosalind Franklin
6) What type of chemical bond joins the bases of complementary DNA strands?
A
ionic
B
hydrophilic
C
covalent
D
hydrogen
7) Nucleosomes are made of ______________________________________.
A
RNA and protein
B
DNA
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
cellular differentiation
B
regeneration
C
gene expression
D
carcinogenesis
9) The human genome contains approximately ______ genes.
A
1,000-2,000
B
2,000-3,000
C
50,000-60,000
D
21,000
10) The Human Genome Project has the potential to ______.
A
lead to treatments for inherited diseases
B
increase our understanding of the historical relationships among species
C
play a role in all of the choices listed here
D
lead to treatments for contagious diseases
*select an answer for all questions
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