levels of organism

Question 1

What is an organelle

Answer 1

Structure within a cell

Question 2

what is an organelle

Answer 2

structure within a cell that carries out a particular function.
examples are the nucleus and the vacuole.

Question 3

what is a system

Answer 3

it is a group of organs which work together for a specific function.
an example is a digestive system, the mouth, stomach and intestines work together to digest food.

Question 4

what is a tissue

Answer 4

a tissue is a group of similar cells that have similar functions, such as muscle tissue.

Question 5

what is an organ

Answer 5

an organ is a group of tissues that work together to achieve a specific function.
examples are the stomach or the heart

Question 6

what does the cell membrane do

Answer 6

the cell membrane surrounds the cells, deciding what enters and leaves the cells through its selectively permeable membrane

Question 7

what is the function of the cell wall

Answer 7

the cell wall surrounds a plant cell, giving the cell structure and shape.
prevents the turgid cells from bursting. Turgid cells support the plant

Question 8

describe photosynthesis

Answer 8

the chemical process in which plants absorb ultraviolet light and carbon dioxide and create glucose and oxygen from these.

Question 9

what is a chloroplast

Answer 9

a chloroplast are organelles only in the plant, where photosynthesis happens

Question 10

what is the cytoplasm

Answer 10

Jelly liquid inside a cell, containing organelles, it is the place where many chemical reactions take place.

Question 11

what are chromosomes

Answer 11

long DNA molecules, found in the nucleus.

Question 12

what is the Vacuole

Answer 12

a large area in most plant cells, containing sap

Question 13

what is a carbohydrate

Answer 13

a carbohydrate is a molecule, such as starch or glycogen, which is made of many simple sugars joined together.

Question 14

what is made of lots of amino acids

Answer 14

proteins

Question 15

what does starch enzymes break down into

Answer 15

carbohydrates

Question 16

what do proteases enzymes break down into

Answer 16

protein

Question 17

what do lipase enzymes break down into

Answer 17

fats (lipids)

Question 18

what do carbohydrates break down to

Answer 18

simple sugar

Question 19

what do proteins break down to

Answer 19

Aino acids

Question 20

what do Fats(lipids) break down to

Answer 20

fatty acid and Glycerol

Question 21

what makes a lipid

Answer 21

three fatty acid and one Glycerol

Question 22

what is a muscle tissue made up of

Answer 22

it is made of proteins

Question 23

what is a simple sugar

Answer 23

a simple sugar is a basic sugar unit like glucose, they can join together to form large carbohydrates such as starch and glycogen

Question 24

how can glucose be tested

Answer 24

using Benedict solution, from blue to an orange-red precipitate

Question 25

how can starch be tested

Answer 25

using iodine, from red to a blue-black precipitate

Question 26

how can protein be tested

Answer 26

using copper sulphate and sodium hydroxide, it forms a violet precipitate

Question 27

define diffusion

Answer 27

the net movement of particles from a region of higher concentration to a region of lower concentration

Question 28

define osmosis

Answer 28

the net movement of water molecules across a partially permeable membrane, from a higher concentration to a lower concentration

Question 29

define active transport

Answer 29

the transfer of molecules across a cell membrane, against the concentration gradient, using energy from cell respiration.