Biology Quiz on Nucleic Acids

Because of base pairing in DNA, the amount of

• Adenine = guanine

• Adenine = thymine

• Thymine = cytosine

• Guanine = thymine

Contains the base Uracil

• RNA

• DNA

• BNA

Which is made of nucleotides

• DNA

• RNA

• Both

Which of the following forms a base pair with thymine?

• Adenine

• Guanine

• Thymine

• Cytosine

What type of bond holds the double stranded DNA molecule together?

• Ionic bonds

• Nitrogen bonds

• Hydrogen bonds

• Polar bonds

A DNA strand that has the bases CTAGGT. What would its complementary strand look like?

• CTAGGT

• TGGATC

• GTUCCA

• GATCCA

In eukaryotes, DNA

• Is located in the nucleus

• Floats freely in the cytoplasm

• Is located in the ribosomes

• Is circular

The “backbone” of DNA is made of

• Sugar and nitrogenous bases

• Sugar and phosphate

• Phosphate and nitrogenous bases

• Phosphate and lipids

If the enzyme helicase did not function properly, then

• Hydrogen bonds between the new DNA strands could not form

• New nucleotides could not be added to the new strand

• The Okazaki fragments could not be linked together

• The hydrogen bonds holding the two strands together could not be broken

When one DNA molecule is copied to make two new DNA molecules, the resulting DNA molecules contain

• None of the parent DNA

• 50% of the parent DNA

• 75% of the parent DNA

• 100% of the parent DNA