Plant cells

Question 1

what are the main features of the leaf palisade cell that suit it to photosynthesis ? (3)

Answer 1

• Long, thin cells that form a layer to absorb sunlight.- Chloroplasts that arrange themselves to collect max. amount of light.- Large vacuole that pushes cytoplasm and chloroplasts to the edge of the cell.

Question 2

chloroplasts vary in size but are disc shaped 2-10 um long and 1 um in diametername 3 main structural features

Answer 2

The chloroplast envelope: A double plasma membrane that surrounds the organelle. It’s highly selective in what enters/exits the cell.The grana: Stacks of up to 100 thylakoids. Within these is the pigment chlorophyll. Some thylakoids have tubular extensions that join up with others in adjacent grana.The stroma: Fluid-filled matrix where the second stage of photosynthesis takes place.

Question 3

Chloroplasts are adapted to their function in the in which 3 ways:

Answer 3

• The granal membranes provide a large surface area for attachment of chlorophyll, electron carriers and enzymes that carry out the first stage of photosynthesis.- The fluid of the stroma possesses all enzymes needed to carry out the second stage of photosynthesis.- Chloroplasts contain DNA and ribosomes so the can quickly manufacture proteins needed for photosynthesis.

Question 4

Cell walls-They consist of _____________s.There is a thin layer called the _____________, which marks the boundary between adjacent cell walls and cements them together. The functions of the cellulose cell wall are:- To provide ____________- To allow ___________________.

Answer 4

polysaccharidesmiddle lamellamechanical strengthwater to pass along it