DNA Structure, Replication, Protein synthesis

What is a codon?

• a sequence of 3 amino acids

• a sequence of three nitrogen bases

• a sequence of 3 enzymes

• a sequence of 3 proteins

The DNA nucleotide is composed of three parts. Which two components make up the nucleotide backbone?

• ribose sugar and base

• ribose sugar and phosphate group

• nitrogen base and deoxyribose sugar

• deoxyribose sugar and phosphate group
  

Which type of RNA delivers the genetic code to the ribosome?

• tRNA

• mRNA

• rRNA

• tmRtmRNA

What is the function of transfer RNA?

• It is a part of the ribosome.

• It bonds to other RNA molecules, leading to their destruction.
  

• It delivers the correct amino acid to the ribosome.

• It carries the information coding for the amino acid sequence of a protein.

Which nucleotide is complementary to adenine?

• adenine

• thymine

• cytosine

• guanine

Which of these is part of the description of protein?

• a folded chain of amino acids

• a folded chain of carbohydrates

• a branched chain of fatty acids

• a branched chain of nucleic acids

Which most directly affects the sequence of amino acids in a protein?

• the DNA in the nucleus of the cell

• the amino acids found in the cytoplasm

• the type of cell in which the protein is made

• the region of the cell in which the protein is made

How are the amino acids linked together during translation?

• by creating peptide bonds

• by creating hydrogen bonds

• by creating covalent bonds

• by creating phospate bonds

What type of bonds hold the nitrogen bases in the DNA rungs together?

• ionic bonds

• hydrogen bonds

• peptide bonds

• james bonds

What is the difference between DNA and RNA

• DNA has uracil and RNA has thymine

• DNA is involved in transcription and RNA is involved in translation

• DNA contains thymine and RNA contains uracil

• DNA is made of nucleotides and RNA is not