Science Test #3, Set 12 (DNA)

Question 1

What is the role of DNA in an organism?

Answer 1

DNA contains the genetic instructions needed for an organism to develop, function, and reproduce

Question 2

Describe the shape and structure of DNA

Answer 2

DNA is in the shape of a double helix. The stucture is composed of deoxirobose, and phosphate. The nitrogen bases are composed of adenine, thymine, cytosine, and guanine.

Question 3

Explain how information is encoded in DNA

Answer 3

DNA encodes information by the sequence of its four nitrogenous bases, adenine, thymine, cytosine, and guanine along the DNA strand

Question 4

Explain how DNA, chromosomes, and genes relate to each other.

Answer 4

Genes are related to DNA because genes are a small portion of DNA. DNA is related to chromosomes because chromosomes are just DNA coiled tightly together.