National 5 Biology - DNA and Protein Synthesis

The diagram shows stages in the production of a protein in a cell. Which option identifies the exact location of each stage?

• Stage 1 - Nucleus, Stage 2 - Cytoplasm

• Stage 1 - Nucleus, Stage 2 - Ribosome

• Stage 1 - Cytoplasm, Stage 2 - Ribosome

• Stage 1 - Cytoplasm, Stage 2 - Nucleus

A single strand of DNA contains 830 adenine, 929 cytosine, 774 guanine and 615 thymine

bases.

How many guanine bases would be in the complementary strand?

• 615

• 774

• 830

• 929

Which of the following represents the sequence of events in the production of a protein from the genetic code?

• DNA -> amino acids -> mRNA -> protein

• DNA -> mRNA -> amino acids -> protein

• mRNA -> DNA -> amino acids -> protein

• amino acids -> DNA -> mRNA -> protein

Which of the following are all types of proteins?

• Hormones, enzymes and nitrates

• Antibodies, enzymes and plasmids

• Hormones, receptors and antibodies

• Receptors, antibodies and nitrates

The diagram represents part of a DNA molecule. Give the term which describes the shape of a DNA molecule as shown in the diagram.

DNA strands are linked together by _________ base pairs.

Which organelle in animal cells stores DNA?

What is the name of the base at position 1 in the diagram?

• A

• T

• C

• G

What is the name of the base at position 2 in the diagram?

• A

• T

• C

• G

The _____ of bases in a strand of DNA differs between every individual person.