IGCSE Chromosomes to protein

How many bases on mRNA code for one amino acid?

• 1

• 2

• 3

• 4

Where in a cell does the translation stage of protein synthesis take place?

• Nucleus

• Mitochondrion

• Lysosme

• Ribosome

Where in the cell is mRNA produced (in the process of transcription)?

On a strand of DNA what sequence of bases is complementary to GCATGCATC

Which base replaces T in RNA?

• C

• G

• A

• U

Which of the following is true of mRNA?

• It has a double helix structure

• It is single stranded

• There is complementary base pairing

• T is present

A protein consists of many of which type of molecule linked together to form a polypeptide chain?

How many molecules of DNA are there in a human body cell?

• 2

• 8

• 23

• 46

State the term for a cell that has half the number of chromosomes

State the term for a section of a chromosome (or a sequence of bases on DNA) that codes for one protein / one characteristic