Grade 11 biology (genetics)

Question 1

Difference between multicellular organisms and unicellular organisms?

Answer 1

Multicellular= cell division, growth, and repair

Unicellular= reproduction

Question 2

What is the key feature of cell division?

Answer 2

Passing chromosomes from parent cell to daughter cells.

Question 3

What is genetic material?

Where is it contained in a chromosome?

Answer 3

All material an organism stores.

In a chromosome genetic material is contained in DNA.

Question 4

What are the 4 nitrogenous bases?

Answer 4

• Adenine
• Thymine
• Cytosine
• Guanine

Question 5

What are the 3 main components in a DNA molecule?

Answer 5

a) 4 nitrogenous bases

b) a phosphate group that has a - charge

c) a penthouse sugar

Question 6

What is nuclein?

Give an example.

Answer 6

Information that controls cell functioning?

An example would be when the top is removed from algae it will regrow because it has received chemical messages from the nucleus.

Question 7

What is X-ray crystallography (not that important)

Answer 7

A method to determine arrangement of atoms within crystal using a bean of x-rays which strikes a crystal and refracts into many directions.

Question 8

What is the chemical backbone made out of?

What is attached to backbone?

Answer 8

Phosphate and sugar groups.

Nitrogenous bases are attached to backbone.

Question 9

How is DNA like a compliment?

Answer 9

1/2 of DNA molecule is a ‘compliment’ to the other half (both halves are symmetrical making it easy to see what the other portion looks like.