The flashcards below were created by user
debbieyeboah
on FreezingBlue Flashcards.
-
what are chemical reactions in the cells controlled by?
enzymes
-
-
what can be speeded up by enzymes?
- photosynthesis
- respiration
- decomposition
-
what gas is produced in aerobic rep?
carbon dioxide
-
what gas is used in aerobic resp?
oxygen
-
what are enzymes made from?
- protein molecules
- they are made up of long chains of amino acids
-
what do enzymes do at high temps?
denature
-
what is an enzyme?
a biological catalyst that speeds up the rate of biological reactions in an organism without being used up.
-
- stage 1: photosynthesis
- stage 2: carbon is converted into carbs, fats & proteins for the animal
- stage 3: respiration
- stage 4: decomposition
-
factors that increase the rate of which microorganisms can digest materials
-
recycling the materials of life:
organisms remove material from the environment for growth and other purposes. These materials are returned to the environment when the organisms die.
-
3 ways the efficiency of a food chain can be improved
- less animals
- limit the movement
- control the conditions in which the animals live in
-
what is energy used for
- keeping warm
- movement
- growth
-
how can we control the rate of photosynthesis?
greenhouses can be used to make plants grow more quickly and become bigger and stronger.
-
why is too little light bad for a plant?
less light decreases the rate of which photosynthesis can happen
-
limiting factors for photosynthesis
-
word equation for photosynthesis
carbon dioxide + water --> glucose + oxygen
-
why do plants need Mg?
to make chlorophyll which gives the plant its green colour
-
why do plants need nitrates?
to form proteins once added with amino acids
-
what do plants need?
- mineral ions,
- sunlight,
- warmth,
- carbon dioxide
-
what is a partially permeable membrane?
a membrane that only allows certain substances to pass through
-
when does diffusion take place?
when there is a net movement in particles
-
where does diffusion take place?
in gases and solutions
-
one waste product that will diffuse out of a cell is ?
carbon dioxide
-
are living things made out of cells?
yes
-
what are the building blocks of life
cells
|
|
