DNA Structure

Which of the following units are repeatedly joined together to form a strand of DNA?

• Amino Acids

• Nucleotides

• Fatty acids

• Polysaccharides

What are the 4 nitrogen bases?

• adenine, thymine, cytoplasm, and guanine

• adenine, thymine cytosine, and guanine

• adenine, thymine, cytosine, and gylcerol

• adenine, thymine, cytosine, and glucose

What are the three components of a nucleotide?

• sugar, hydrogen, nitrogen base

• sugar, oxygen, nitrogen base

• sugar, phosphate, nitrogen base

• sugar, phosphate, protein

If a DNA molecule is 18% Guanine which of the following is correct

• 18% cytosine, 32% adenine, 32% thymine

• 32% cytosine, 18% adenine, 32% thymine

• 18% cytosine, 64% adenine, 64% thymine

• 32% cytosine, 32% adenine, 18% thymine

Which of the following best describes a DNA molecule?

• double helix

• contains ribose

• made of amino acids

• contains Uracil

Why is DNA important?

• it is very small and very complicated

• it's in everything

• it serves as the blueprint for traits of all living things

• because we eat it every day for energy

What determines the code, or information, of a DNA molecule?

• the shape (structure) of the nitrogen bases

• the order (sequence) of the nitrogen bases

• the colour of the nitrogen bases

• the frequency (number) of nitrogen bases

Nitrogenous bases are joined by which type of bond?

• polar bonds

• ionic bonds

• covalent bonds

• hydrogen bonds

A long chain of amino acids is a/an

• protein

• nucleic acid

• tRNA

• mRNA

The sugar in DNA is ?

• sucrose

• glucose

• deoxyribose

• ribose