MOLECULAR BASIS OF INHERITANCE

What does DNA have that RNA doesn't

• Presence of thymine

• Presence of deoxyribose

• Presence of ribose

• Both a and b

The steps (rungs) of the DNA ladder are made up of __________.

• phosphate groups

• sugars

• nitrogen bases

• amino acids

Which of the following is true of DNA but not of RNA?

• It is made up of a single strand of nucleotides.

• It contains the sugar deoxyribose.

• It leaves the nucleus to translate protein.

• It contains the nitrogen base uracil.

Which of the following best represents the Central Dogma?

• DNA --> RNA --> proteins

• RNA --> DNA --> proteins

• DNA --> proteins --> RNA

• proteins --> RNA --> DNA

What is the nature of the strands of the DNA duplex?

• Anti-parallel and complementary

• Identical and complementary

• Anti-parallel and non-complementary

• Dissimilar and non-complementary

If the total amount of adenine and thymine in a double-stranded DNA is 45%, the amount of guanine in this DNA will be

• 22.5%

• 27.5%

• 45%

• 55%

DNA is a polymer made of ______

• sugars

• amino acids

• fats

• nucleotides

State chargaff’s rule

• Adenine=cytosine and guanine=thyamine

• Adenine=thyamine and cytosine=guanine

• Adenine=guanine and thyamine=cytosine

What is the function of tRNA

• To synthesize protein

• To help in replication

• a binding site for RNA polymerase

• To carry amino acids to ribosome

Who proposed the semiconservative nature of DNA

• Fredrick griffith

• Francis crick and watson

• Darwin

• Meselson and stahl