Quiz on DNA Structur 196- 205

What is the structure of DNA often compared to?

• A twisted ladder

• A straight line

• A circular loop

• A square grid

Which of the following are the nitrogenous bases found in DNA?

• Adenine, Guanine, Cytosine, Thymine

• Adenine, Guanine, Cytosine, Uracil

• Adenine, Guanine, Thymine, Uracil

• Adenine, Cytosine, Thymine, Uracil

What are the purine bases in DNA?

• Adenine and Guanine

• Cytosine and Thymine

• Thymine and Uracil

• Cytosine and Uracil

What is the role of a codon in DNA?

• It codes for a single amino acid

• It codes for a double amino acid

• It codes for a sugar molecule

• It codes for a phosphate group

Which enzyme is responsible for unwinding DNA during replication?

• Helicase

• Polymerase

• Ligase

• Primase

What is the role of RNA in relation to DNA?

• RNA acts as a competitor to DNA.

• RNA acts as a helper to DNA.

• RNA destroys DNA.

• RNA replaces DNA.

Which type of RNA carries a copy of a strand of DNA and transports it from the nucleus to the cytoplasm?

• Ribosomal RNA

• Transfer RNA

• Messenger RNA

• Viral RNA

What sugar is found in RNA that is different from DNA?

• Deoxyribose

• Glucose

• Ribose

• Fructose

Which nitrogenous base is found only in RNA?

• Thymine

• Adenine

• Guanine

• Uracil

What does the law of segregation state?

• An organism receives half of its alleles from each parent.

• Traits are passed on randomly and not influenced by other traits.

• Two different alleles are present in a pair, the dominant one is expressed.

• Genes are located on chromosomes.