photosynthesis Flashcards
what does photosynthesis mean?
using light to make food
what is the green pigment in carrot leaves called?
chlorophyll
what is the word equation for photosynthesis?
carbon dioxide + water — glucose + oxygen
what type of sugars are glucose and sucrose?
soluable
what does soluble mean?
it can flow through liquid
what can glucose be converted into for storage?
starch
why is starch better for storage than glucose?
because it is insoluble
what are glucose and starch used for in plants?
energy growth and other storage products
what is the chemical symbol for glucose?
C6 H12 06
what else is glucose and starch converted into in a plant?
cellulose to make new cell walls
proteins for growth and repair
fats and oils
why is glucose unsuitable for storage?
because it easily dissolves and can be lost from the cell. It also increases the concentration of cell contents which could damage the cells
what are the properties of starch?
is insoluble
not very reactive
does not affect water concentration
what are isotopes?
different forms of the same element
how is oxygen made in a plant?
the water is split up into oxygen gas and hydrogen ions
what is starch made up of?
many glucose molecules joined together
give 2 reasons why plants need to grow faster in spring and summer months?
the higher the temperature increases the rte of reaction of enzymes involved in photosynthesis
The extra light and warmth
why do pea plants need to be covered by glass in February?
to keep them warm
what are the conditions needed in a greenhouse?
warmth
extra carbon dioxide
increased light
name 3 factors that could limit photosynthesis?
light intensity
temperature
carbon dioxide level
where is carbon dioxide taken in through a plant?
its leaves
what does a plant do at night?
it takes in oxygen for respiration and releases carbon dioxide
