lecture #7 plant cells

Question 1

what do some eukaryotic cells have to pump water out to make sure the cytoplastic concentration is maintained?

Answer 1

• contractile vacuole (found in protists)

Question 2

what do plant cells have/not have that animal cells do

Answer 2

have:
- cell wall /central vacuole/chloroplats
doesn‘t have
centrioles

Question 3

what is the cell wall made of?

Answer 3

• cellulose

Question 4

what is the function of the cell wall

Answer 4

• supports the cell and ultimitely the plant (to make in hold up right)
• helps prevent water loss

Question 5

what are plasmodesmata

Answer 5

pores in cell wall
- pores permit movement of fluids between cells (water and small solutes can pass freely)

Question 6

what are the pores in cell wall called

Answer 6

plasmodesmata

Question 7

do animal cells have a CENTRAL vacuole?

Answer 7

they do not have a central vacuole, but they have many small vacuoles . some protists have contractile vacuole to get rid of ecess water

Question 8

what is the function of the central vacuole

Answer 8

• supports cell and the plant
• site of storage (proteins, inorganic ions, pigments, defensive compounds ex. come plants produce chemicals that stop them from bring eaten.
• disposing of metabolic waste (or else would endager cell if accumulated in cytoplasm)

Question 9

characteristic central vacuoles

Answer 9

• 90% plant cell volume
• helps maintain turgor (absorbtion of fluid content)

Question 10

what are chloroplasts

Answer 10

site of photosynthesis

Question 11

where are chloroplasts found

Answer 11

green part of the plant

Question 12

what do chloroplasts contain

Answer 12

chlorophyll

Question 13

can plants do cellular respiration

Answer 13

plants can do photosunthesis and cellular respiration

Question 14

what are the energy converting organelles

Answer 14

mitochondria: food —- to ATP
chloroplast : solar energy —– food

Question 15

what does the mitochondria need to make atm

Answer 15

0^2 (waste CO2)

Question 16

what does chloroplast use to make glucose

Answer 16

CO2 and solar energy (waste 02)

Question 17

what is the common point between chloroplast and mitochondria

Answer 17

• make their own set of ribosomes
• can self-replicate
• double membrane
• energy converting organelle

Question 18

what is a zigote

Answer 18

fertilized egg

Question 19

what do all cells have in common

Answer 19

every cell within an organisme has the same genetic composition

Question 20

what makes cells accomplish certain functions (become certain types of cells)

Answer 20

specifc genes are turned on and others are turned off
not all genes are active at the same time (20% of genes are active at a time)