6A: Components of DNA and DNA Replication

6A: Components of DNA and DNA Replication

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Multiple Choice

The shape of DNA is called:

• Helix

• Double helix

• Triple helix

• Ladder

Multiple Choice

What is the monomer of DNA?

• Amino acid

• Glucose

• Fatty acid

• Nucleotide

Multiple Choice

What part of the DNA molecules carries the code for specific traits?

• The sequence of nitrogen bases

• Sugar-phosphate backbone

• "Sides" of the ladder

• The phosphate

Multiple Choice

6A In 1952 Rosalind Franklin took the x-ray photograph shown, which gave the world its first look at DNA.

By studying this photograph, scientists gained knowledge about the —

• role of DNA in protein synthesis

• mutation of nucleotide sequences in DNA

• sequence of DNA that makes up the human genome

• double-helix structure of DNA

Multiple Choice

6A Eight components present in nucleic acids are listed in the box.

Which components bond with adenine in a section of double-stranded DNA?

• 1, 3, 5,and 6 only

• 3 and 5 only

• 2 and 4 only

• 3, 4, 7, and 8 only

Multiple Choice

6A A segment of DNA is represented in the illustration

How is information for a specific protein carried on the DNA molecule?

• As a sequence of nucleotides

• In the double-helix shape of the condensed chromosome

• In the ratio of adenines to thymines

• As a pattern of phosphates and sugars

Multiple Choice

6A: Students are given data from an investigation that identified some of the chemical elements present in four different samples. Which sample was most likely DNA?

• Sample 1

• Sample 2

• Sample 3

• Sample 4

Multiple Choice

What happens during the S phase?

• A checkpoint over the connection of the spindle fibers
• The cell grows
• DNA is replicated
• The cell enters the G0 phase

Multiple Choice

In DNA only, Adenine always pairs with:

• Thymine

• Cytosine

• Uracil

• Guanine

Multiple Choice

What is the bond between nitrogen bases?

• Carbon

• Nitrogen

• Hydrogen

• Oxygen

Multiple Choice

Replicate the following strand of DNA: 
AATCATGGA

• AATCATGGA
• TTAGTACCT
• UUAGUACCU
• GGATAUCUA

Multiple Choice

6A A student builds a model of a DNA strand

Which of these models of a DNA strand shows bases that are complementary to the ones on the student’s DNA model?

Multiple Choice

6A: A student used poster board to construct this model of a section of DNA. Which statement describes this model of DNA?

• The model is inaccurate because the base pairs are incorrect

• The model is accurate because it contains correctly paired bases

• The model is accurate because it shows each base splitting to form a double helix

• The model is inaccurate because some of the typical bases in DNA are missing

Multiple Choice

6A A segment of a DNA strand is shown.

3’ AGGTCAGGT 5’

Which of these is the correct complementary DNA strand for the segment shown?

• 5’ AGGTCAGGT 3’

• 5’ ACCUGAGGU 3’

• 5’ TGGACTGGA 3’

• 5’ TCCAGTCCA 3’