DNA Structure & Replication

What are the nucleotides made of?

• Sugar, Phosphate, nitrogen base
• Phosphate, Adenine, nitrogen base
• Thymine, Adenine, Cytomine
• Phosphate, Nitrogen, Adenine

Which of the following statements BEST describes the relationship between DNA, chromosomes, and genes?

• Genes are made of chromosomes which are found on DNA

• DNA is made of genes which are broken down into chromosomes

• Genes are segments of DNA and DNA is packaged into chromosomes.

• Chromosomes are segments of genes which are packaged into chromosomes.

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

In the Henry-Chase experiment, bacteriophages were labeled with radioactive isotopes to determine if it was the DNA or the proteins that stored genetic information. What was the conclusion reached?

1. Bacteriophages inject their DNA into bacterial cells.

2. Bacteriophages inject their protein into the bacterial cells.

3. Bacteriophages inject carbohydrates into the bacterial cells.

4. Bacteriophages absorb DNA from bacterial cells.

• Bacteriophages inject their DNA into bacterial cells.

• Bacteriophages inject their protein into the bacterial cells.

• Bacteriophages inject carbohydrates into the bacterial cells.

• Bacteriophages absorb DNA from bacterial cells.

Frederic Griffith used the word transformation to describe the changes in bacteria that he observed. Which is the most useful definition of transformation?

• a permanent change in gene expression

• a permanent change in the function of activity of a cell

• a temporary change in the genetic composition of an organism.

• a permanent change int he genetic composition of an organism

What are the 4 nitrogen bases?

• adenine, thymine, cytoplasm, and guanine
• adenine, thymine cytosine, and guanine
• adenine, thymine, cytosine, and gylcerol
• adenine, thymine, cytosine, and glucose

Which sequence of DNA bases would pair with this partial strand
ATG TGA CAG

• ATG TGA CAG
• TAC ACT GTC
• GTA AGT GAC
• CAT TCA CTG

Chargaff’s rules of base pairing are explained by which structural feature of DNA?

• DNA is double stranded, and a hydrogen bonds between base pairs hold the two strands together.

• DNA is double stranded, and covalent bonds between identical nucleotides hold the two strands together.

• The nucleotides of DNA may be arranged in a wide variety of sequences.

• Each strand of DNA contains a phosphate and sugar back bone.

In eukaryotes, which organelle is DNA usually found in?

• cell membrane

• vacuole

• chloroplast

• nucleus

Tags

NGSS.MS-LS1-2

NGSS.MS-LS3-1

Which shows the correct complementary base pairing for DNA?

• C-A, T-G
• A-G, C-T
• C-G, U-A
• T-A, G-C

The sugar in DNA is ?

• sucrose
• glucose
• deoxyribose
• fructose