Biology DNA TEST

The synthesis of a new double strand of DNA begins when the two strands of the original DNA

• A.are separated by the breaking of hydrogen bonds between nitrogen bases

• B.acts as a template

• C.attracts a nitrogen base

• D.destroysthe entire genetic code

After DNA replication, the two DNA molecule that are made

• are opposite

• B. are identical

• C.leave the nucleus

• D. cannot replicate again

Which scientists produced X ray patterns that showed the fibers of DNA to be twisted?

• A.Crick and Franklin

• B. Watson and Crick

• C. Wilkins and Franklin

• D. Chargaff and Wilkins

Cytosine and Thymine are

• A. Phosphates

• B. Nucleic Acids

• C. Purines

• D. Pyrimidines

The two strands of a DNA double helix are

• A. Purines

• B. Pyrimidines

• C. Complementary

• D. Identical

A nucleotide does NOT consist of a

• A. Nitrogen Base

• B. 5 Carbon Sugar

• C. phosphate group

• D. polymerase

New mRNA is made through the process of:

• A. Duplication

• B. Transcription

• C.Translation

• D. Crystallography

Each combination of three nitrogen bases on messenger RNA forms a (an)

• A. Anticodon

• B. Codon

• C. Enzyme

• D. Nucleic Acid

Which does not carry out its function in the ribosomes?

• A.mRNA

• B. tRNA

• C. rRNA

• D. DNA

The genetic code of an organism is determined by

• A.The number of amino acids in its cell

• B.The speed at which polypeptides are produced

• C.The sequence of nitrogen bases in its DNA

• D.The shape of ribosomes in its cell

Tags

NGSS.HS-LS1-1