AMSCO Modern Genetics

Front

What are the two bases present in equal amounts in a double-stranded DNA molecule?

Back

Adenine and thymine.

Front

What initiates the replication of a double-stranded DNA molecule?

Back

The strands separate at the hydrogen bonds.

Front

What are the components of a DNA nucleotide?

Back

Phosphate, deoxyribose, and a nitrogenous base (thymine, adenine, cytosine, or guanine).

Front

Arrange the following structures in order of decreasing size: DNA, nucleus, chromosome, nucleotide, nitrogenous base.

Back

Nucleus, chromosome, DNA, nucleotide, nitrogenous base.

Front

What is the genetic material responsible for the individuality of an organism?

Back

DNA.

Front

What is the structure that carries genetic information in cells?

Back

DNA (Deoxyribonucleic acid).

Front

What are the four nitrogenous bases found in DNA?

Back

Adenine, thymine, cytosine, and guanine.

Front

What type of bond holds the two strands of DNA together?

Back

Hydrogen bonds.

Front

What is the role of messenger RNA (mRNA) in protein synthesis?

Back

mRNA carries the genetic code from DNA to the ribosome for protein synthesis.

Front

What is the difference between DNA and RNA?

Back

DNA is double-stranded and contains thymine, while RNA is single-stranded and contains uracil.