RNA and Protein Synthesis

Unlike DNA, RNA contains

• adenine
• uracil
• phosphate groups
• thymine

Which type of RNA brings the information in the genetic code from the nucleus to other parts of the cell?

• rRNA
• tRNA
• mRNA
• RNA polymerase

From which molecules are mRNA molecules transcribed?

• tRNA
• rRNA
• DNA
• proteins

 How many nucleotides are needed to specify three amino acids?

• 3
• 6
• 9
• 12

What happens during translation?

• Messenger RNA is made from a DNA code.
• The cell uses a messenger RNA code to make proteins
• Transfer RNA is made from a messenger RNA code.
• Copies of DNA molecules are made.

Which is the correct sequence of the transfer of information in most organisms?

• protein to DNA to RNA
• RNA to DNA to protein
• DNA to RNA to protein
• RNA to protein to DNA

The genetic code is always read

• 3 bases at a time in the same direction.
• 4 bases at a time in the same direction.
• 3 bases at a time and the direction varies.
• 4 bases at a time and the direction varies.

A mutation that involves one or a few nucleotides is called

• a mutagen.
• an inversion.
•  a point mutation.
•  a translocation.

Which of the following is a chromosomal mutation?

• inversion
• insertion
• point mutation
• substitution

When a chromosome undergoes a deletion mutation, information is

• repeated
• lost
• reversed
• transferred