Unit 3 Target 1: DNA Structure And Function
- 1.Which of the following is a nucleotide found in DNA?
- A.
Ribose + phosphate group + thymine
- B.
Ribose + phosphate group + uracil
- C.
deoxyribose + phosphate group + uracil
- D.
Deoxyribose + phosphate group + cytosine
- 2.In a DNA molecule, what base is paired with cytosine?
- A.
Thymine
- B.
Guanine
- C.
Adenine
- D.
Uracil
- 3.Because of base pairing in DNA, the percentage of
- A.
Adenine molecules in DNA is about equal to the percentage of guanine molecules.
- B.
Pyrimidines in DNA is about equal to the percentage of purines.
- C.
Purines in DNA is much greater than the percentage of pyrimidines.
- D.
Cytosine molecules in DNA is much greater than the percentage of guanine molecules.
- 4.Genes are sections of DNA that contain instructions for assembling
- A.
Purines.
- B.
Nucleosomes.
- C.
Proteins.
- D.
Pyrimidines.
- 5.In eukaryotes, DNA
- A.
Is located in the nucleus.
- B.
Floats freely in the cytoplasm.
- C.
Is located in the ribosomes.
- D.
Is circular.
- 6.DNA contains the sugar
- A.
Ribose.
- B.
Deoxyribose.
- C.
Glucose.
- D.
Lactose.
- 7.What combines with sugar and a phosphate group to form a nucleotide?
- A.
Amino acid
- B.
Deoxyribose
- C.
Glycerol
- D.
Nitrogenous base
- 8.
Despite the diversity of nature, most organisms contain the same 4 DNA bases. This table shows the DNA composition of 3 organisms as reported in a classic 1950s experiment.Based on this study, what did scientists conclude about the DNA composition of all organisms?- A.
A, G, T, and C occur in equal percentages.
- B.
A and G occur in equal percentages, and T and C occur in equal percentages.
- C.
A and T occur in equal percentages, and G and C occur in equal percentages.
- D.
A and C occur in equal percentages, and T and G occur in equal percentages.
- 9.Which of the following are Purines?
- A.
Only Adenine
- B.
Only Guanine
- C.
Only Cytosine
- D.
Only Thymine
- E.
Adenine and Cytosine
- F.
Adenine and Guanine
- 10.Which of the following are Pyrimidines?
- A.
Only Adenine
- B.
Only Guanine
- C.
Only Cytosin
- D.
Only Thymine
- E.
Cytosine and Thymine
- F.
Cytosine and Guanine
- 11.The 5' to 3' strand is called the
- A.
Lagging strand.
- B.
Leading strand.
- C.
Starting strand.
- D.
Replication strand.
- 12.The 3' to 5' strand is also called the
- A.
Lagging strand.
- B.
Leading strand.
- C.
Ending strand.
- D.
Replication strand.
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