Cells

Question 1

what are in animal cells

Answer 1

cell membrane
nucleus
nuclear membrane
chromosomes
mitochondria
glycogen molecules

Question 2

what are in plant cells

Answer 2

cell wall
cell membrane
nucleus
nuclear membrane
vacuole
mitochondria
chloroplasts
starch granules
cytoplasm

Question 3

What is the function of the nucleus

Answer 3

it controls the cell

Question 4

what is the function of the cytoplasm

Answer 4

chemical reactions take place here

Question 5

what is the function of the cell membrane

Answer 5

it provides support/holds the cell together

Question 6

what is the function of the mitochondria

Answer 6

carries out respiration

Question 7

what is the function of the cell wall

Answer 7

it prevents the cell from bursting

Question 8

what is the function the vacuole

Answer 8

it supports the plant/keep it in shape

Question 9

what is the function of the chloroplasts

Answer 9

it traps light to help carry out photosynthesis

Question 10

where is root hair cell found and what is its adaptations

Answer 10

Root hair cell is found in the plant roots and it has a long outgrowth so is can take up lots of water

Question 11

what are the differences between animal and bacterial cells

Answer 11

~bacterial cells don’t have a nucleus
~plasmid dna
~flagellum
~it has a cell wall (not made from cellulose)

Question 12

label the microscrope

Answer 12

~eyepiece lens
~eyepiece
~spine
~objective lens
~clips
~stage
~course and fine focusing nobs
~light source

Question 13

how do you workout total magnification

Answer 13

total magnification = eyepiece lens magnification X objective lens magnification

Question 14

how to make a onion cell slide

Answer 14

1. peel a thin layer of the inner bit of the onion
2. put the thin piece of the onion onto a microscope slide and add two drops of iodine
3. slowly lower the cover slip onto the microscope with a mounted needle

Question 15

how many micrometers are in 1mm

Answer 15

1000 micrometers

Question 16

how do you workout the magnification

Answer 16

m = I/A

 I ———  A x M

Question 17

what is a stem cell

Answer 17

stem cells are very simple, undifferentiated cells that can be multiplied or differentiate into specialized cells in the body

Question 18

where is the source of adult stem cells

Answer 18

found in the bone marrow, blood, heart tissues

Question 19

what are the advantages of using embryonic stem cells

Answer 19

embryonic stem cells can differentiate into any cell in the human body while adult stem cells can differentiate into limited type of cells

Question 20

ethical issues with stem cells

Answer 20

~some people think that the use of the embryos in this way is murder
~ some people believe this is against human rights if the embryo
~ some people feel it may lead to the production of designer babies or human cloning

Question 21

why are plants growing unevenly

Answer 21

plants grow in particular regions called apices. shoot and root tips are examples of apices