Question

12. Erwin Chargaff's work showed that a DNA molecule will have equal proportions of adenine and thymine, and equal proportions of cytosine and guanine. This was essential for individuals who later worked on the DNA structure. The explanation for this characteristic of DNA is because ___ a. it coils into a helical shape b. it is composed of two complementary, paired strands c. it carries genes made of A, C, T, and G d. proteins cause the structure to be stabilized e. nucleotides are made of sugars, phosphates, and bases. 13. Which of the following DNA structures has the highest ratio of proteins to DNA? a. Beads on a string d. euchromatin b. 10-nm nucleosome structures e. not enough information to discern c. heterochromatin 14. The DNA is wrapped around special proteins called_ a. Spacers c. Nucleoprotein filaments e. Nuclear organizing proteins b. Nucleosomes d. Histones 15. In a double helix of DNA _ a. The backbones have opposite polarity b. Bases on one strand are attracted to bases on the other strand with hydrogen bonds c. A complementary pair of bases always includes one purine and one pyrimidine d. Both a and b are correct e. a, b, and c are all correct 16. DNA encodes instructions for producing cellular components, determining how an organism looks and functions. This is known as the _ a. Inheritance theory c. Mendel's theory e. Evolutionary theory b. Cell theory d. Gene theory 17. A nucleotide is composed of _ a. a pentose sugar d. All of the above b. one phosphate group e. Only a & c c. one of the five possible nitrogenous bases 18. When thymidine and adenosine interact within the DNA molecule, they form _ a. two hydrogen bonds. d. phosphodiester bonds. b. three hydrogen bonds. e. phosphate-sugar backbones c. nucleotide triphosphates. 19. A, P, and E sites are active sites found in the . a. DNA c. Ribosome e. Golgi Apparatus b. RNA d. Nucleolus 20. The process through which RNA is interpreted to produce peptides is called _ a. transcription b. replication c. translation d. proteination e. mutation 21. Which portions of a pre-mRNA molecule are "spliced" out? a. Exons b. TATA boxes c. Histones d. Introns e. Xenons 22. The loaded tRNAs enter into a functional ribosome at the _____ site. a. E b. P c. A d. initiator e. promoter

12. Erwin Chargaff's work showed that a DNA molecule will have equal proportions of adenine and thymine, and equal proportions of cytosine and guanine. This was essential for individuals who later worked on the DNA structure. The explanation for this characteristic of DNA is because _______
a. it coils into a helical shape
b. it is composed of two complementary, paired strands
c. it carries genes made of A, C, T, and G
d. proteins cause the structure to be stabilized
e. nucleotides are made of sugars, phosphates, and bases.

13. Which of the following DNA structures has the highest ratio of proteins to DNA?
a. Beads on a string
d. euchromatin
b. 10-nm nucleosome structures
e. not enough information to discern
c. heterochromatin

14. The DNA is wrapped around special proteins called_______
a. Spacers
c. Nucleoprotein filaments
e. Nuclear organizing proteins
b. Nucleosomes
d. Histones

15. In a double helix of DNA _______
a. The backbones have opposite polarity
b. Bases on one strand are attracted to bases on the other strand with hydrogen bonds
c. A complementary pair of bases always includes one purine and one pyrimidine
d. Both a and b are correct
e. a, b, and c are all correct

16. DNA encodes instructions for producing cellular components, determining how an organism looks and functions. This is known as the _______
a. Inheritance theory
c. Mendel's theory
e. Evolutionary theory
b. Cell theory
d. Gene theory

17. A nucleotide is composed of _______
a. a pentose sugar
d. All of the above
b. one phosphate group
e. Only a & c
c. one of the five possible nitrogenous bases

18. When thymidine and adenosine interact within the DNA molecule, they form _______
a. two hydrogen bonds.
d. phosphodiester bonds.
b. three hydrogen bonds.
e. phosphate-sugar backbones
c. nucleotide triphosphates.

19. A, P, and E sites are active sites found in the ______.
a. DNA
c. Ribosome
e. Golgi Apparatus
b. RNA
d. Nucleolus

20. The process through which RNA is interpreted to produce peptides is called _______
a. transcription
b. replication
c. translation
d. proteination
e. mutation

21. Which portions of a pre-mRNA molecule are "spliced" out?
a. Exons
b. TATA boxes
c. Histones
d. Introns
e. Xenons

22. The loaded tRNAs enter into a functional ribosome at the _______ site.
a. E
b. P
c. A
d. initiator
e. promoter

12. Erwin Chargaff's work showed that a DNA molecule will have equal proportions of adenine and thymine, and equal proportions of cytosine and guanine. This was essential for individuals who later worked on the DNA structure. The explanation for this characteristic of DNA is because
a. it coils into a helical shape
b. it is composed of two complementary, paired strands
c. it carries genes made of A, C, T, and G
d. proteins cause the structure to be stabilized
e. nucleotides are made of sugars, phosphates, and bases.

13. Which of the following DNA structures has the highest ratio of proteins to DNA?
a. Beads on a string
d. euchromatin
b. 10-nm nucleosome structures
e. not enough information to discern
c. heterochromatin

14. The DNA is wrapped around special proteins called
a. Spacers
c. Nucleoprotein filaments
e. Nuclear organizing proteins
b. Nucleosomes
d. Histones

15. In a double helix of DNA
a. The backbones have opposite polarity
b. Bases on one strand are attracted to bases on the other strand with hydrogen bonds
c. A complementary pair of bases always includes one purine and one pyrimidine
d. Both a and b are correct
e. a, b, and c are all correct

16. DNA encodes instructions for producing cellular components, determining how an organism looks and functions. This is known as the
a. Inheritance theory
c. Mendel's theory
e. Evolutionary theory
b. Cell theory
d. Gene theory

17. A nucleotide is composed of
a. a pentose sugar
d. All of the above
b. one phosphate group
e. Only a c
c. one of the five possible nitrogenous bases

18. When thymidine and adenosine interact within the DNA molecule, they form
a. two hydrogen bonds.
d. phosphodiester bonds.
b. three hydrogen bonds.
e. phosphate-sugar backbones
c. nucleotide triphosphates.

19. A, P, and E sites are active sites found in the .
a. DNA
c. Ribosome
e. Golgi Apparatus
b. RNA
d. Nucleolus

20. The process through which RNA is interpreted to produce peptides is called
a. transcription
b. replication
c. translation
d. proteination
e. mutation

21. Which portions of a pre-mRNA molecule are "spliced" out?
a. Exons
b. TATA boxes
c. Histones
d. Introns
e. Xenons

22. The loaded tRNAs enter into a functional ribosome at the site.
a. E
b. P
c. A
d. initiator
e. promoter

Added by Melissa C.

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