Cellular Control

Question 1

What is apoptosis?

Answer 1

Programmed cell death

Question 2

What are the homeotic genes?

Answer 2

Involved in controlling anatomical development according to body plan

Question 3

What do homeotic genes contain?

Answer 3

Homeobox sequences

Question 4

What are homeobox sequences?

Answer 4

Sequence of 180 base pairs (excluding introns) found within homeotic genes

Question 5

Where are homeobox genes found?

Answer 5

In plants, animals and fungi

Question 6

Where are hox genes found?

Answer 6

Only animals

Question 7

How do the hox genes control body plan?

Answer 7

They regulate the development of embroils along the anterior to posterior axis

Question 8

Steps of apoptosis?

Answer 8

Enzymes break down cytoskeleton The cytoplasm becomes dense The cell surface membrane changes and blebs form
Chromatin condenses, the nuclear envelope breaks and DNA breaks into fragments Cell breaks into vesicles and are ingested by phagocytosis

Question 9

What does a lack of apoptosis result in?

Answer 9

Tumours

Question 10

What is the homeodomain sequence?

Answer 10

A 60- amino acid sequence