Key knowlage Flashcards

1
Q

name the organelle that controls substances entering and leaving the cells

A

Cell membrane

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2
Q

name a condition that may be treated with stem cells

A

diabetes or paralysis

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3
Q

name an adaptation of a root hair cell

A

large surface area

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4
Q

name the organelle that is the site of respiration

A

Mitochondria

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5
Q

name the organelle that contains cell sap

A

vacuole

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6
Q

state 3 conditions that can affect the rate of diffusion

A

concentration, temperature, surface area

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7
Q

what is active transport

A

movement of particles from an area of low concentration to high concentration which requires energy from respiration

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10
Q

where in the cell do the most chemical reactions take place

A

cytoplasm

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11
Q

what type of cells are bacteria cells

A

prokaryotic

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12
Q

name the organelle that is the site of photosynthesis

A

chloroplasts

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12
Q

what is present in eukaryotic cells but not prokaryotic cells

A

a nucleus

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13
Q

name the organelle that contains cellulose

A

cell wall

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13
Q

name the circular piece of DNA found in bacteria cells

A

plasmid

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13
Q

what is diffusion

A

movement of partials from an area of high concentration to low concentration

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14
Q

what is osmosis

A

diffusion of water molecules from a dilute solution to a concentrated solution through a partially permeable membrane

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16
Q

name the organelle that controls cell activities

17
Q

name 1 adaptation that alveoli have to increase the rate of diffusion

A

thin cell membrane

18
Q

name the organelle that contains chlorophyll

A

chloroplasts

19
Q

name the adaptation of muscle cells

A

the ability to contract and relax

19
Q

describe an adaptation of a sperm cell

A

a long tail for movement

21
Q

what type of cells are plant and animal cells

A

eukaryotic

21
Q

write down the equation to calculate magnification

A

image size / actual size

22
Q

name the organelle that produces proteins

23
Q

what does active transport allow plants to absorb through their roots

24
name one advantage that an electron microscope has over a light microscope
higher magnification and resolving power
25
name the cell division that is important in growth and development
mitosis
27
what type of cells can differentiate into any type of cell
stem cells
28
where can stem cells be found in the human body
embryos or adult bone marrow
29
where can stem cells be found in a plant
meristem tissue
30
what happens to the genetic material in the first stage of mitosis
doubles