bio first Flashcards
what structure in the leaf let in CO2 and releases O2
stomata
where does photosynthesis occur
palisade mesophyll / leaf/ chloroplast
give the symbol equation for photosythesis
6CO2 + 6H2O => C6H12O6 + 6O2
what tissue/ structure transport the glucose from the leaves into the roots
phloem
.
.
what glucose converted into for storage ? e.g in vegetables
starch
why does a plant need to store glucose
they can no longer do photo
so they use it for respiration
what is chlorophyll
Chlorophyll is a pigment that gives plants their green colour, and it helps plants create their own food through photosynthesis.
how else does plants use glucose
what does an epidermis do
cover and protect surfaces
what does an palisade mesophyll do
contains a lot of chloroplast and can carry out photosynthesis
what does an spongy mesophyll
have large air space between cells and a large surface area for diffusion of gases
xylem
transport water in plants
phloem
transport sugars around the plant
Is a flower a tissue, an organ or a system
an organ
This organelle is the site of photosynthesis
chloroplast
through which structure and which process do gases enter and exit the leaf
structure: Stomata
process: Diffusion
chemical symbol for glucose
C6 H12 06
This pigment molecule absorbs light energy for photosynthesis
chlorophyll
Name 3 factors that the rate of photosynthesis can be limited by.
light intensity
CO2 Concentration
temperature
what substances is found in the xylem cell wall + functions
lignin = provides strength and resistance against pathogens
cellulose = gives strength
what is the function of stomata in the plant
regulate gas exchange between the plant and environment and control of water loss
This surface of the leaf loses most water
the bottom because that is where the stomata is and the top has a waxy cuticle so water cant go through there anyway
Root hair cells
allows the plant to absorb more water by Large surface area
word equation for photosynthesis:
water + carbon dioxide → glucose + oxygen.
What type of reaction is photosynthesis?
endothermic reaction.
Is water a limiting factor?
no because it would die from other things before it runs out of water
Why do enzymes work quicker until the optimum temperature?
that’s where the rate of reaction is the highest
Why do enzymes stop working above the optimum temperature?
Some of the bonds holding the enzymes together starts to break
The active site starts to change shape
it then changes so much that the substrate can’t fit
What structure in the plant transports water? How is it adapted for this function?
