DNA and 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

Which nucleotide is complementary to adenine?

• adenine
• thymine
• cytosine
• guanine

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 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 many amino acids can be represented by a single 3-base DNA sequence?

• 1
• 3
• 6
• 8

DNA codes for __________ which determine ___________

• mRNA, tRNA
• mRNA, ribosomes
• proteins. traits
• proteins, peptide bonds

The drawing shows the structure of what molecule?

• A DNA molecule
• A lipid molecule
• A carbohydrate molecule
• A protein molecule

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