DNA replication1

Multiple Choice

Why did early scientists believe that protein, rather than DNA, was the cell's hereditary material?

• Because proteins are made of 20 different amino acids and are more complex than DNA

• Because proteins are easier to isolate than DNA

• Because DNA was thought to be unstable

• Because proteins are found in all cell types

Multiple Choice

Which of the following conclusions was supported by the Hershey & Chase experiment involving bacteriophage viruses?

• DNA is the cell's genetic material

• Protein is the cell's genetic material

• Both DNA and protein are equally responsible for heredity

• Chromosomes are made only of protein

Fill in the Blanks

Erwin Chargaff showed that in a body or somatic cell, the percentage of adenine is equal to the percentage of

.

Multiple Choice

According to Chargaff's rule, which bases pair together in DNA?

• Adenine with Thymine, Guanine with Cytosine

• Adenine with Cytosine, Guanine with Thymine

• Adenine with Guanine, Thymine with Cytosine

• Adenine with Thymine, Guanine with Thymine

Multiple Choice

Who took x-ray diffraction photographs of DNA crystals that contributed to the discovery of DNA's structure?

• Rosalind Franklin

• James Watson

• Francis Crick

• Maurice Wilkins

Fill in the Blanks

The two strands of DNA are coiled to form a

helix.

Multiple Select

Which of the following are components of the DNA backbone?

• Phosphate

• Deoxyribose

• Nitrogenous base

• Hydrogen bond

Multiple Choice

Which of the following is NOT a component of a DNA nucleotide?

• Phosphate group

• Deoxyribose (sugar)

• Nitrogenous base

• Amino acid

Multiple Choice

Which of the following nitrogenous bases are purines?

• Adenine and Guanine

• Thymine and Cytosine

• Adenine and Thymine

• Guanine and Cytosine

Multiple Choice

Which of the following statements about base pairing in DNA is correct?

• Purines only pair with purines

• Pyrimidines only pair with pyrimidines

• Purines only pair with pyrimidines

• Adenine pairs with cytosine

Fill in the Blanks

DNA stands for Deoxyribo

Acid.

Labeling

Label the nucleotide

Drag labels to their correct position on the image

Phosphate

Sugar

Nitrogenous base

Labeling

label the following parts of the DNA Molecule.

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Nucleotide

Hydrogen Bonds

Phosphate

nitrogen bases

sugars

Labeling

Label the following structure

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nitrogen base

Lipids

deoxyribose

phosphate

glucose

Labeling

Drag the labels to the appropriate place on the diagram.

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Deoxyribose

Phosphate

A - T base pair

Hotspot

Select ALL the NITROGEN BASES in the picture (4 total)

Match

Match the following

• Phosphate

• 5 Carbon sugar

• Nitrogen base

• Hydrogen bond

• The image shown

Helps create the backbone of DNA

Connected to Phosphate and Nitrogen base

Creates "rungs" of DNA, can be adenine, thymine, cytosine or guanine

Connects the two sides of DNA to each other

Nucleotide

• Helps create the backbone of DNA

• Connected to Phosphate and Nitrogen base

• Creates "rungs" of DNA, can be adenine, thymine, cytosine or guanine

• Connects the two sides of DNA to each other

• Nucleotide

Labeling

Label the DNA molecule.

Drag labels to their correct position on the image

Deoxyribose

Thymine

Cytosine

Hydrogen Bonds

Hotspot

Which arrow is pointing to the phosphate?

Labeling

Label the Nucleotide

Drag labels to their correct position on the image

Phosphate Group

Nitrogen Base

5 Carbon Sugar