Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

. > cells > Flashcards

cells Flashcards

1
Q

def magnification

A

is the num of the times larger an image is compared to the real size of an object

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

equ for mag

A

i/am

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

def resolution

A

ability to distinguish two objects close together rather than see them as a single object

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what is a nuclear envelope

A

two membranes that form the outside

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what is the nuclear pore

A

small gaps between, within the envelope

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what does nuclear pore do

A

helps things go in an out (DNA doesn’t leave)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what is mRNA (messenger)

A

protein synthesis that is a copy of DNA

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what two things does mRNA do

A

leaves through pores
attaches to ribosomes to synthesise (proteins)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what is a nucleolus

A

where DNA for making ribosomes is found

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

what is the endoplasmic reticulum

A

network of membranes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

how many types of endoplasmic reticulum

A

2: RER contains ribosomes, SER lacks ribosomes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what is RER

A

a continuation of the nuclear envelope

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what is a cisterna

A

a flattened membrane vesicle found in the endoplasmic reticulum and Golgi apparatus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

where does protein synthesis take place

A

RER

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

is SER cell specific or not

A

its cell specific

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

what does SER do

A

acts as storage organelle (saves ions for later)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

what is the Golgi apparatus

A

A stack of small flat sacs formed by membranes inside the cell’s cytoplasm (gel-like fluid) (pancake shape)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

what arear does the membrane surround

A

area of fluid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

where is protein made

A

in endoplasmic reticulum (ER), vesicles produced

20
Q

where do vesicles float though

A

cytoplasm to the golgi ap to be absorbed

21
Q

what is created and released into the cytoplasm

A

secretory vesicle

22
Q

where do vesicles move to

A

cell membrane and molecules are released out of cell

23
Q

how many membranes does mitochondria have

A

2, outer covers organelle, inner folds many times (cristae)

24
Q

what is a cristae

A

inner folds of inner membrane (increases surface area)

25
Q

which membrane does chemical reactions take place inner membrane out outer

A

inner, increased SA allows small organelles to work more

26
Q

what is the matrix

A

fluid inside the mitochondria where DNA is found

27
Q

what is chloroplast

A

where protein synthesis takes place (fund in plants and algae)

28
Q

what is a thylakoid

A

enclosed third membrane, folded into disks

29
Q

what is a grana

A

thylakoid disks that get stacked into piles

30
Q

what is a stroma

A

space between inner membrane and thylakoid

31
Q

Cell surface membrane
what is
what is does

A

made up of lipids and protein
controls what goes in and out
has receptors to respond to chemicals

32
Q

mitochondria
what is
what is does

A

double membrane, matrix (contains enzymes for respiration)
where aerobic respiration takes place, requires a lot of energy

33
Q

ribosomes
what is
what is does

A

made up of proteins (not surrounded by membrane)
where proteins are made

34
Q

lysosome
what is
what is does

A

round organelle surrounded by membrane
digestive enzymes, kept away from cytoplasm by membrane, break down components out of cell, digest invading cells

35
Q

nuclear envelope
what is
what is does

A

maintain shape of nucleus (2nd membrane)
helps regulate flow if molecule in and out pores

36
Q

golgi apparatus
what is
what is does

A

fluid filled , membrane bound, flattened sacs with vesicles on edges
processes and packages new proteins and lipids
makes lysosomes

37
Q

cytoplasm
what is
what is does

A

gel like substance
most chemical reactions in cells take place

38
Q

rough endoplasmic reticulum
what is
what is does

A

system of membranes enclosing fluid filled space covered in ribosomes
folds and processes protein ribosomes have made

39
Q

nucleolus
what is
what is does

A

ribosomal synthesis (RNA) produces ribosomes
contains DNA to make ribosomes

40
Q

nucleus
what is
what is does

A

large organelle surrounded by nuclear envelope (contains pores)
contains chromatin (made of DNA nd proteins)
DNA has info on making proteins
allows substances (RNA) to move between nucleus and cytoplasm

41
Q

what is transcription

A

first stage of protein synthesis in whuch an mRNA copy of gene is made from DNA in the nucleus

42
Q

DNA stands for

A

deoxyribonucleic acid, nucleic acid contains pentose sugar deoxyribose

43
Q

vacuole PL
what is
what is does

A

organelle that contains cell sap
store water, nutrients and waste material to get rid of them

44
Q

cell wall PL
what is
what is does

A

supports plant cells
carbohydrate cellulose, rigid structure

45
Q

chloroplast PL
what is
what is does

A

double membrane + thylakoid
forms grana

46
Q

channel>
,0 PL
what is
what is does

A

plasmodesmata, intercellular communication
allow molecules to pass from cell to cell (substance exchange)

. (1 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions