Biology gcse aqa Questions and Verified Answers/
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Terms in this set (218) QUIZZES VERIFIED ANSWERS
1) Nucleus -A part of the cell containing DNA
and RNA and responsible for
growth and reproduction
-controls all activities in the cell
2) Cytoplasm -jellylike fluid inside the cell
-chemichal reactions take place
here
3) cell membrane controls which substances can
enter or leave the cell.
4) cell wall -made of cellulose
-strengthens and provides support
to the cell
5) vacuole -A sac inside a cell that acts as a
, storage area
-helps keep the cell rigid
6) mitochondria -most of the energy is released
during respiration
7) chloroplast -contains chlorophyll for
photosynthesis
-traps light
8) ribosomes (animal cell only) all proteins are synthesised here
9) magnification size of image/real image size
10) a cell membrane is... ...partially permeable
11) Diffusion -movement of molecules from an
area of higher concentration to an
area of lower concentration
-does not require energy
12) factors that affect diffusion -distance
-concentration gradient
-surface area
13) rate of diffusion surface area(times by)gradient(then
divided by)thickness of exchange
surface
14) Eukaryotic cells -larger
-nucleus
-membrane bound organelles
, -DNA tightly wrapped around
histone proteins in chromosomes
-cellulose in plant cell walls.
15) prokaryotic cells -doesnt have an organelle
-very simple so can produce very
quickly
-bacteria
16) osmosis required practical 1. Use potato borer to create 3
cylinders of potato
2. Cut the skin off and make sure
they're the same length
3. Label your boiling tubes
4. Pour 20ml of each solution into
the labelled boiling tube
5. Make a results table
6. Weigh each cylinder and record it
on the table and put in boiling tube
7. Leave enough time for osmosis
to occur
8. Remove, dry and reweigh chips
17) osmosis -diffusion of water across a
selectively permeable membrane
18) active transport the movement of particles up a
Complete Solutions with Rationales |Get It 100%
Accurate!! Already Passed!!
Terms in this set (218) QUIZZES VERIFIED ANSWERS
1) Nucleus -A part of the cell containing DNA
and RNA and responsible for
growth and reproduction
-controls all activities in the cell
2) Cytoplasm -jellylike fluid inside the cell
-chemichal reactions take place
here
3) cell membrane controls which substances can
enter or leave the cell.
4) cell wall -made of cellulose
-strengthens and provides support
to the cell
5) vacuole -A sac inside a cell that acts as a
, storage area
-helps keep the cell rigid
6) mitochondria -most of the energy is released
during respiration
7) chloroplast -contains chlorophyll for
photosynthesis
-traps light
8) ribosomes (animal cell only) all proteins are synthesised here
9) magnification size of image/real image size
10) a cell membrane is... ...partially permeable
11) Diffusion -movement of molecules from an
area of higher concentration to an
area of lower concentration
-does not require energy
12) factors that affect diffusion -distance
-concentration gradient
-surface area
13) rate of diffusion surface area(times by)gradient(then
divided by)thickness of exchange
surface
14) Eukaryotic cells -larger
-nucleus
-membrane bound organelles
, -DNA tightly wrapped around
histone proteins in chromosomes
-cellulose in plant cell walls.
15) prokaryotic cells -doesnt have an organelle
-very simple so can produce very
quickly
-bacteria
16) osmosis required practical 1. Use potato borer to create 3
cylinders of potato
2. Cut the skin off and make sure
they're the same length
3. Label your boiling tubes
4. Pour 20ml of each solution into
the labelled boiling tube
5. Make a results table
6. Weigh each cylinder and record it
on the table and put in boiling tube
7. Leave enough time for osmosis
to occur
8. Remove, dry and reweigh chips
17) osmosis -diffusion of water across a
selectively permeable membrane
18) active transport the movement of particles up a
