DNA Structure and Function Review

What is the base sequence of strand X?

• A. G-T-A-C

• B. T-G-C-A

• C. G-T-C-A

• D. A-T-C-G

The diagram represents an incomplete section of a DNA molecule. The boxes represent unidentified bases. When the boxes are filled in, how many letter A's will there be (BOTH inside AND outside the boxes)?

• A. 1

• B. 2

• C. 3

• D. 4

In the accompanying diagram, strands I and II represent portions of a DNA molecule. Strand II would normally include

• A. AGC

• B. TCG

• C. TAC

• D. GAT

Tags

NGSS.HS-LS1-1

The diagram below represents a portion of a DNA molecule.The letters represent different types of

• A. sugar molecules

• B. molecular bases

• C. enzymes

• D. proteins

Tags

NGSS.HS-LS1-1

The DNA of a fly and the DNA of a gorilla are made up of subunits that are

• A. arranged in the same order in both species

• B. arranged in chains of the same length in both species

• C. different bases in each of the two species

• D. in different sequences in each of the two species

Tags

NGSS.HS-LS3-2

NGSS.HS-LS4-2

If one strand of DNA molecules has a base sequence of A-G-C-T-A, the complementary strand of DNA would have the base sequence

• 1. A-G-C-T-A

• 2. U-C-G-A-T

• 3. U-C-G-A- U

• 4. T-C-G-A-T

During DNA replication separation of "unzipping" of the DNA molecule will normally occur when hydrogen bonds are broken between

• 1. thymine and thymine

• 2. adenine and cytosine

• 3. guanine and uracil

• 4. cytosine and guanine

What is the name of the basic unit of DNA containing a sugar, a phosphate and one of four nitrogen bases?

• 1. Adenine

• 2. Nucleotide

• 3. Helix

• 4. RNA

What is the shape of a DNA molecule?

• 1. rectangle

• 2. triangle

• 3. circle

• 4. double helix

What is the name of the five carbon sugar found in DNA?

• 1. deoxyribose

• 2. glucose

• 3. phosphate

• 4. protein