Nucleus

Question 1

What does the nucleus do?

Answer 1

• Controls the cell’s activities ( through the transcription of DNA ).
• Contains the organisms genetic material.

Question 2

What is the nuclear envelope?

Answer 2

• A double membrane that surrounds the nucleus.

* Has an outer membrane that is continuous with the endoplasmic reticulum of the cell and has ribosomes on its surface.

Question 3

What is the purpose of the nuclear envelope?

Answer 3

• Controls entry and exit of materials in and out of the nucleus.
• Contains the reactions taking place within the nucleus.

Question 4

What is the purpose of nuclear pores?

Answer 4

• Allow passage of large molecules ( mRNA ) out of the nucleus.

Question 5

What is the nucleoplasm?

Answer 5

The material that makes up the bulk of the nucleus.

Question 6

What is the nucleolus?

Answer 6

A small spherical region within the nucleoplasm.

Question 7

What is the purpose of the nucleolus?

Answer 7

• Manufactures ribosomal RNA and assembles the ribosomes.

Question 8

What is inside the nucleus?

Answer 8

• Nuclear Envelope
• Nuclear Pores
• Neoplasm
• Chromosomes
• Nucleolus.

Question 9

What are the functions of the nucleus?

Answer 9

• Act as the control cell of the cell through the production of mRNA and tRNA, and protein synthesis.
• Retain the genetic material of the cell in the form of DNA and chromosomes.
Manufacture ribosomal RNA and ribosomes.

Question 10

What are the structures that make up the mitochondrion?

Answer 10

• Double membrane
• Matrix
• Cristae

Question 11

What does the double membrane do?

Answer 11

• Controls the entry and exit of material.

Question 12

How are the cristae formed?

Answer 12

The inner membrane of the double membrane folds to form a structure called cristae.

Question 13

What is the matrix?

Answer 13

• Contains protein, lipids, ribosomes, and DNA that allows the mitochondria to control the production of their own proteins.
• Contains enzymes involved in respiration.
The Matrix makes up inside of the mitochondrion.

Question 14

What is the cristae?

Answer 14

Extensions of the inner membrane.

Question 15

What is the purpose of the cristae?

Answer 15

Provide a large surface area for the attachment of enzymes and other proteins involved in respiration.

Question 16

What is the purpose of the mitochondrion?

Answer 16

• Mitochondria are the site of aerobic respiration.

* Where ATP is produced.

Question 17

Where are mitochondrion found in large quantities?

Answer 17

Found in large numbers in cells that are very active and require a lot of energy.