Biología

All nucleotides contain each of the following except a

• protein.

• nitrogenous base.

• sugar.

• phosphate group.

In base pairing bewteeen DNA strands, hydrogen bonds are formed between

• adenine and thymine.

• adenine and guanine.

• guanine and thymine.

• adenine and cytosine.

The technique Franklin used to study DNA was

• radioactive labeling.

• chromatography.

• X-ray diffraction.

• transformation.

If one strand of DNA has the sequence of nitrogenous bases AACTG, its complementary strand has the sequence

• AACTG.

• TTGAC.

• TAUCG.

• AACUC.

Nucleotides are joined together to form the DNA chain by links between

• phosphate groups and guanine nitrogen bases.

• adenine and thymine nitrogenous bases.

• adenine nitrogenous bases and phosphate groups.

• deoxyribose molecules and phosphate groups.

The Hershey-Chase experiments on bacteriophages showed that genetic information is carried in

• proteins.

• bacteria.

• DNA.

• RNA.

Tags

NGSS.HS-LS1-1

What radioactive isotopes were used in the Hershey-Chade experiments?

• sulfur-35 and phosphorus-32

• carbon-14 and sulfur-35

• carbon-14 and iodine-132

• carbon-14 and phosphorus-32

What was the significance of the radioactive isotopes Hershey and Chase chose?

• Phosphorous is abundant in DNA, while sulfur is abundant in protein.

• Phosphorous is abundant in protein, while sulfur is abundant in DNA.