DNA Replication

Each organism has a unique combination of characteristics encoded in molecules of

• protein

• enzymes

• carbohydrates

• DNA

The primary function to DNA is to

• make proteins

• store and transmit genetic information

• control chemical processes within cells

• prevent mutations

All of the following are true about the structure of DNA except

• short strands of DNA are contained in chromosomes inside the nucleus of a cell

• every DNA nucleotide contains a sugar, a phosphate group, and a base

• DNA consists of two strands of nuleotides joined by hydrogen bonds

• the long strands of nucleotides are twisted into a double helix

Molecules of DNA are composed of long chains of

• amino acids

• fatty acids

• monosaccharides

• nucleotides

Which of the following is not part of a molecule of DNA?

• Deoxyribose

• nitrogenous base

• phosphate

• ribose

The part of the molecule for which deoxyribonucleic acid is named is the

• phosphate group

• sugar

• nitrogenous base

• none of the above: DNA is note named after part of the molecule

Purines and pyrimidines are

• bases found in amino acids

• molecules that can replace phosphate groups from defective DNA

• names of specific types of DNA molecules

• bases found in nucleotides

The scientists credited with establishing the structure of DNA are

• Avery and Chargaff

• Hersey and Chase

• Mendel and Griffith

• Watson and Crick

Watson and Crick built models that demonstrated that

• DNA and RNA have the same structure

• DNA is made of two chains in a double helix

• guanine forms hydrogen bonds with adenine

• thymine forms hydrogen bonds with cytosine

The base-pairing rules state that the following are bases in DNA

• adenine-thymine; uracil-cytosine

• adenine-thymine; guanine-cytosine

• adenine-guanine; thymine-cytosine

• uracil-thymine; guanine-cytosine