B4

HideShow resource information
what do all cells contain?
DNA and organelles (the different parts of a cell's structure)
1 of 22
what are the parts of an animal cell?
cytoplasm(where chemical reactions take place and the production of proteins), mitochondria (contains enzymes needed for aerobic respiration), a nucleus (contains DNA) and a cell membrane (allows chemicals to pass in and out)
2 of 22
what are the parts of a plant cell?
all the parts of a aniaml cell and acell (made of cellulose to strengthen the cell), a permanent vacuole (helps support the cell) and chloroplasts (contains a green pigment chlorophyll and enzymes needed for photosynthesis)
3 of 22
what features do microbial cells have?
a cell wall (not made of cellulose) and DNA ( not in a nucleus or in chromosomes)
4 of 22
what are enzymes?
protein molecules which speed up reactions produced according to the instructions in DNA
5 of 22
what happens to enzymes at different temperatures?
low temperatures = less frequent collsions (slower reaction) at the specific tem = working at optimum and at too high temperatures = reaction slows down as enzymes become denatured
6 of 22
what is the lock and key model?
only one molecule can fit into a enzyme. this is explained by the lock (enzyme) and key (molecule) model
7 of 22
what is the active site?
the place where the molecule fits into the enzyme. it has a specific shape. this is where the molecule is broken down then realeased
8 of 22
what changes the active site?
heating too high and changing the PH level causes the enzyme to denature meaning the molecule no longer fits into the enzyme.
9 of 22
describe aerobic respiration...
releases energy inside cells by breaking down glucose with oxygen (glucose+oxygen = carbon dioxide+water+energy)
10 of 22
what is the energy released in aerobic respiration used for?
movement, synthesis of large molecules and active transport
11 of 22
describe anaerobic respiration...
(less effective) releases energy inside the cytoplasm by breaking down glucose without oxygen (glucose = carbon dioxide+ehtanol (microbial cells) or lactic acid (animal and plant cells)+energy)
12 of 22
when does anaerbic respiration happen?
when there isn't enough oxygen for the other one - plant roots in waterlogged soil or human mucells during exercise
13 of 22
what is the symbol for glucose?
C6H12O6
14 of 22
uses of anaerobic respiration?
provides alittle bit more energy to cells when very necessary, yeast and fermentation
15 of 22
describe the stages of photosynthesis...
1)light energy is absorbed by chlorophyll 2) light energy is used to rearrange the atoms in carbon 3) oxygen is a waste product
16 of 22
what are the limiting factors for photosynthesis?
temperature (as it rises so does photosynthesis but at 45 the enzymes become denatured), carbon dioxide concentration (rises so does photosynthesis but has no effect after a certain level) and light intensity (rises so does photosy but stops at level
17 of 22
what is a quadrat and a transect?
anything with a defined area and a random section across an area
18 of 22
describe diffusion...
the overall moement of substances from regions of high concentration to regions of low concentration
19 of 22
describe active transport...
the movement of substances against the concentration gradient. this requires energy.
20 of 22
describe osmosis...
it is a type of diffusion - the overall movement of water from a dilute solution to a concentrated one through a parcially permeable membrane.
21 of 22
how do plants absorb nutrients?
normally through diffusion but they use active transport to absorb nitrates from the soil (this uses energy form respiration)
22 of 22

Other cards in this set

Card 2

Front

what are the parts of an animal cell?

Back

cytoplasm(where chemical reactions take place and the production of proteins), mitochondria (contains enzymes needed for aerobic respiration), a nucleus (contains DNA) and a cell membrane (allows chemicals to pass in and out)

Card 3

Front

what are the parts of a plant cell?

Back

Preview of the front of card 3

Card 4

Front

what features do microbial cells have?

Back

Preview of the front of card 4

Card 5

Front

what are enzymes?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all B4 resources »