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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-phosphate-sugar-phosphate pattern
B
nitrogenous bases
C
a repeating sugar-nucleotide-sugar-nucleotide pattern
D
paired nucleotides
2) In a DNA double helix, adenine pairs with ______ and guanine pairs with ______.
A
thymine... cytosine
B
guanine... adenine
C
cytosine... thymine
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
ACTTGC
B
CAGGTA
C
TGAACG
D
CAGGUA
4) Who discovered the structure of DNA?
A
Franklin
B
Watson and Crick
C
Pauling
D
Hershey and Chase
5) Evidence for the spiral nature of DNA came from ______.
A
base rule studies by Chargaff
B
bacteriophage studies by Hershey and Chase
C
X-ray crystallography studies by Rosalind Franklin
D
studies of disease-causing bacteria by Griffith
6) What type of chemical bond joins the bases of complementary DNA strands?
A
covalent
B
hydrophilic
C
hydrogen
D
ionic
7) Nucleosomes are made of ______________________________________.
A
proteins
B
DNA and histone proteins
C
DNA
D
RNA and protein
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
gene expression
B
carcinogenesis
C
regeneration
D
cellular differentiation
9) The human genome contains approximately ______ genes.
A
2,000-3,000
B
1,000-2,000
C
21,000
D
50,000-60,000
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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