DC3 Revision Biology

Question 1

What is a Sperm Cell and adaptions of it?

Answer 1

Sperm Cells are specialised for Fertilisation, they have a flagellum for propulsion, they also have a mitochondria to provide energy for their journey.

Question 2

Root Hair Cell and adaptions of it?

Answer 2

Specialised for absorbing water and minerals from soil, adaptions are thin cell walls and a large permanent vacuole.

Question 3

Egg Cells and adaptions?

Answer 3

An Egg Cell lets sperm enter for fertilisation, large surface area, sue.face is covered with proteins and receptors to bind with sperm cells.

Question 4

Muscle Cells and 2 adaptions of it?

Answer 4

Muscle cells allow movement through contractions, two adaptions.p of it are multiple nuclei and nerve responsevnessl

Question 5

Animal Cells and their organelles?

Answer 5

Ribosomes, nucleus, cell membrane, cytoplasm, mitochondria

Question 6

Plant Cells and theirs?

Answer 6

Ribosomes, nucleus, chloroplasts, cell membranes, vacuoles, cell walls, mitochondria, cytoplasms

Question 7

Bacterium Cells and their organelles?

Answer 7

Nucleus, flagella, cell wall, ribosomes ,cytoplasm, pilli, capsule, plasma membrane, plasmid

Question 8

Diffusion

Answer 8

Net movement of anything generally from a region of higher concentration to lower concentration.
D- for down gradient

Question 9

What is Active Transport?

Answer 9

Moving substances from a more dilute solution to a more concentrated solution against the concentration gradient. Requires energy. A- for against gradient

Question 10

Osmosis?

Answer 10

Diffusion of water From a dilute solution to a concentrated solution through a partially permeable membrane.
O- for obeying the rule of Down