Lesson 2

Question 1

What is the nucleus of a cell?

Answer 1

Is largest organelle of the eukaryotic cell which controls most cell processes and contains genetic information for protein synthesis

Question 2

What is the nuclear envelope?

Answer 2

Double membrane allowing the transport of mRNA and ribosomes out of the nucleus

Question 3

What is the nucleoplasm?

Answer 3

Contains chromatin (DNA bound to Justine protein)

Question 4

What is the nucleolus?

Answer 4

Spherical body inside the nucleus which synthesises mRNA

Question 5

What is the purpose of the mitochondria?

Answer 5

Release ATP energy during aerobic respiratiin

Question 6

Describe features of the mitochondria

Answer 6

• Double membrane filled with fluid in the inter membrane space
• Cristae - Inner membrane that is folded to increase SA
• Matrix - Substance inside membrane containing enzymes and 70s ribosomes
• Circular DNA

Question 7

Why can large numbers of mitochondria be found in the muscles?

Answer 7

High demand for energy for continuous contractions