Life The Science of Biology 9th Edition Sadava Hillis Heller Berenbaum Test Bank

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Life The Science of Biology 9th Edition Sadava Hillis Heller Berenbaum Test Bank Download

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ISBN-10: 1429219629

ISBN-13: 9781429219624 978-1429219624

1. Examination of ice found on Mars has revealed that it contains some of the elements needed for life. Which of the following has not been found in the ice?
A) Potassium ions
B) Magnesium ions
C) Glucose
D) Sodium ions
E) Chlorine ions
2. Examination of ice from Mars suggests that
A) life may not be limited to Earth.
B) life originated in outer space from nonliving matter.
C) comets brought Earth most of its water.
D) meteorites brought life to Earth.
E) meteorites are responsible for Earth’s magnetic field.
3. A nucleotide contains a pentose sugar, a phosphate group, and
A) a lipid.
B) an acid.
C) a nitrogen-containing base.
D) an amino acid.
E) a glycerol.
4. The difference between nucleosides and nucleotides is
A) only nucleotides have nitrogenous bases.
B) a phosphate groups is found in nucleotides but not in nucleosides.
C) nucleotides have the pentose sugar ribose while nucleosides have the pentose sugar deoxyribose.
D) in nucleosides the monomers are joined by phosphodiester bonds; in nucleotides the monomers are joined by hydrogen bonds.
E) nucleosides are the monomers of DNA; nucleotides are the monomers of RNA.
5. The bases of nucleic acids are purines or pyrimidines. Purines and pyrimidines are distinguished by the fact that
A) purines include the bases of cytosine and thymine; pyrimidines include the bases of adenine and guanine.
B) pyrimidines are found in RNA; purines are found in DNA.
C) purines consist of hydrogen, carbon, oxygen, and nitrogen, whereas pyrimidines have phosphorus, hydrogen, carbon, oxygen, and nitrogen.
D) purines only have single bonds in their structure, whereas pyrimidines have both single and double bonds in their structure.
E) purines are double-ring structures, whereas pyrimidines are single-ring structures.
6. Ribose and deoxyribose are both found in nucleic acids. The difference between ribose and deoxyribose is that
A) deoxyribose has one less oxygen molecule than ribose has.
B) ribose is a pentose sugar, whereas deoxyribose is a hexose sugar.
C) deoxyribose is found in DNA, whereas ribose is found in RNA.
D) Both a and b
E) Both a and c
7. The “backbone” of a nucleic acid molecule is made of
A) nitrogenous bases.
B) alternating sugars and phosphate groups.
C) purines.
D) pyrimidines.
E) nucleosides.
8. Which of the following is not a difference between DNA and RNA?
A) DNA has thymine, whereas RNA has uracil.
B) DNA usually has two polynucleotide strands, whereas RNA usually has one strand.
C) DNA has deoxyribose sugar, whereas RNA has ribose sugar.
D) DNA is a polymer, whereas RNA is a monomer.
E) In DNA, A pairs with T, whereas in RNA, A pairs with U.
9. What is attached to the 5´-carbon of deoxyribose in DNA?
A) Adenine
B) Phosphate
C) Guanine
D) Thymine
E) Hydrogen
10. According to the principle of complementary base pairing, purines always pair with
A) deoxyribose sugars.
B) uracil.
C) pyrimidines.
D) adenine.
E) guanine.
11. What is the nucleotide sequence of the complementary strand of the DNA molecule: A A T G C G A?
A) T T A C G C T
B) A A T G C G A
C) G G C A T A G
D) C C G T T A T
E) A G C G T A A
12. DNA differs from RNA in that
A) RNA contains uracil instead of thymine.
B) RNA is single stranded; DNA is double stranded.
C) RNA leaves the nucleus: DNA does not.
D) RNA contains ribose; DNA contains deoxyribose.
E) All of the above
13. All of the following bases are found in DNA except
A) thymine.
B) adenine.
C) uracil.
D) guanine.
E) cytosine
14. What type of bond connects two complementary nucleotides together?
A) Hydrogen
B) Ionic
C) Peptide
D) Phosphodiester
E) Covalent
15. Which of the following depend on complementary base pairing?
A) DNA replication
B) Transcription
C) Translation
D) Both a and b
E) All of the above
16. Complementary base pairing is due to the
A) geometry of the sugar–phosphate backbone.
B) pairing of a purine with a pyrimidine.
C) hydrogen bonding sites.
D) Both a and b
E) All of the above
17. The diversity in DNA molecules is due to
A) physical shape differences of the molecule.
B) functional differences in DNA molecules.
C) base sequence differences in the DNA molecule.
D) hydrogen bonding differences found in the DNA molecule.
E) complementary base pairing differences in DNA molecules.
18. Single-stranded RNA can fold on itself, creating three-dimensional structures such as tRNA. The folds are stabilized by _______ bonds.
A) hydrogen
B) ionic
C) phosphodiester
D) peptide
E) glycosidic
19. The four nitrogenous bases of RNA are abbreviated as
A) A, G, C, and T.
B) A, G, T, and N.
C) G, C, U, and N.
D) A, G, U, and T.
E) A, G, C, and U.
20. The double-helix structure of DNA is the result of
A) complementary base pairings.
B) purines bonding with pyrimidines.
C) the phosphodiester bonds between deoxyribose and phosphate.
D) hydrogen bonding of the two complementary polynucleotide strands.
E) ionic bonding of base pairs.
21. In DNA, A pairs with T, and C pairs with G; these are examples of a specific type of reaction called
A) complementary base pairing.
B) a dehydration reaction.
C) a reduction reaction.
D) a hydrophobic reaction.
E) a purine–purine reaction.
22. Complementary base pairing can be explained by
A) the relative sizes of purines and pyrimidines.
B) the alternating sugar–phosphate groups.
C) an examination of evolutionary relationships.
D) the differences found in RNA and DNA.
E) the diversity found in proteins.
23. What accounts for the stability of the DNA molecule?
A) The bonds between purines and pyrimidines
B) Phosphodiester bonds between the nitrogenous bases
C) Strong hydrogen bonds between the sugar and phosphate groups
D) Its double-helix shape
E) The direct bonding of the base to the phosphate molecule
24. DNA carries genetic information in its
A) helical form.
B) sequence of bases.
C) tertiary sequence.
D) sequence of amino acids.
E) phosphate groups.
25. The central dogma of molecular biology states that
A) the genetic code is ambiguous.
B) the information flow between DNA, RNA, and a protein is reversible.
C) the information flow in a cell is from DNA to RNA to protein.
D) the information flow in a cell is from protein to RNA to DNA.
E) the information flow in a cell is from DNA to a protein to RNA.

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