Unit 3 Review (Biology)

What is DNA the molecule of?

• Protein Production

• Heredity

• Cellular Cleansing

• Creating energy

How many strands does DNA have?

• 1

• 2

• 3

• 4

What nitrogen base always combines with cytosine on a DNA strand?

• Adenine

• Cytosine

• Guanine

• Thymine

What nitrogen base always combines with adenine in a DNA strand?

• thymine

• uracil

• guanine

• cytosine

What is translation in protein synthesis?

• when mRNA makes a copy of DNA

• When a protein is made using the instructions from mRNA

What is translation in protein synthesis?

• When mRNA makes a copy of DNA

• When a protein is made using the instructions from mRNA

Where does transcription occur?

• Ribosome

• Mitochondria

• Lysosome

• Nucleus

Where does translation occur?

• Ribosome

• Mitochondria

• Lysosome

• Nucleus

What nitrogen base replaces thymine on RNA strands?

• Uracil

• Guanine

• Cytosine

• Phsosphate

The chain of amino acids forms a chain of peptide bonds that coil together to form

• Carbohydrate

• Sugar

• Protein

• Fat