Cell Structure

Question 1

Sperm cell

Answer 1

Tail- to swim to fertilise egg
Mitochondria- for respiration to swim to fertilise egg
Enzymes- in head to break down the egg wall

Question 2

Nerve cell

Answer 2

Very long- to cover distance in body
Branched connections- to connect to other nerve cells

Question 3

Muscle cell

Answer 3

Mitochondria- to release energy for contraction
Contains protein fibres- can contract to make cell shorter

Question 4

Root hair cell

Answer 4

Grows into long ‘hairs’ to increase surface area for absorption
Mitochondria- to release energy for the active transport of mineral ions from soil

Question 5

Phloem and xylem

Answer 5

Form tubes in plants- to help transport substances
Long- join from end to end
Xylem- hollow in centre
Phloem- have very few sub-cellular structures to allow things to flow easily

Question 6

Prokaryotic cells

Answer 6

Single celled
Small single loop of DNA
Small rings of DNA called plasmids
Smaller than eukaryotic cells

Question 7

Magnification=

Answer 7

Image size / actual size

Question 8

Resolution

Answer 8

Smaller change a device can measure