Science - biology

Question 1

Cell wall

Answer 1

Made up of cellulose. Provide protection to the cell.

Question 2

Nucleus

Answer 2

DNA = set of instructions that tell the cell how to build proteins. Contains DNA and chromosomes of the cell.

Question 3

Mitochondria

Answer 3

Process of respiration which releases energy from the food you eat.

Question 4

Chloroplasts

Answer 4

Green chemical called chlorophyll. Where photosynthesis takes place, light energy from the sun is converted into chemical energy.

Question 5

Vacuoles

Answer 5

Very large and empty space in the middle, containing water and minerals - cell sap. Contains large amounts of water and stores other important materials.

Question 6

Cytoplasm

Answer 6

Contains mostly water / jelly like substance. Site of where many important chemical reactions take place.

Question 7

What are the features of a plant cell

Answer 7

Chloroplasts
Nucleus
Cell wall of cellulose
Vacuole
Cell membrane
Mitochondrion
Cytoplasm

Question 8

What are the features in an animal cell

Answer 8

Cytoplasm
Nucleus
cell membrane
Mitochondrion

Question 9

What is a procedure carried out on plant cells so they are visible un der a microscope

Answer 9

Stain the cells

Question 10

How to figure out the magnification of the microscope

Answer 10

Magnification of the eye piece x the magnification of the objective lens

Question 11

Magnification equation triangle

Answer 11

Image size
Actual size x Magnification

Question 12

Magnification

Answer 12

Image size / actual size

Question 13

Image size

Answer 13

Actual size * magnification

Question 14

Actual size

Answer 14

Image size / magnification

Question 15

How many micrometres are in a mm

Answer 15

1000 micrometres

Question 16

Name the type of white blood cell

Answer 16

Lymphocyte

Question 17

Egg cell

Answer 17

Large, contains half the genetic material.
Contains the nutrients for a developing embryo, the other genetic material is when the sperm fuse with the egg cell

Question 18

Sperm cell

Answer 18

Tail (flagellum), plasma membrane, nucleus contains half the DNA.
Propels itself towards the egg cell using its tail, helps it burrow through the egg.

Question 19

Root hair cell (plant roots)

Answer 19

Large surface area, mitochondria.
Adapted to take up water and mineral ions, larger surface area = increase rate of absorption

Question 20

Ciliated cell

Answer 20

Airways, hairs, has cilia (hair like structures).
Traps mucus, wafts mucus out of the lungs and wafts eggs along the oviduct.

Question 21

Palisade cell

Answer 21

Sponge layer, contains lots of chloroplasts.
Photosynthesise (absorb sunlight)

Question 22

Red blood cell

Answer 22

Carry oxygen through the lungs and deliver it through the body. bi - concave disc maximises their surface area to absorb oxygen.

Question 23

Organism

Answer 23

A term for a living thing. There are three main groups of organism - bacteria, archaea and eukaryote organism.

Question 24

Tissue

Answer 24

A group of cells working together to perform a shared function, and often with similar structures.

Question 25

Organ

Answer 25

A structure made up of a group of tissues, working together to perform specific functions.

Question 26

Cell

Answer 26

Basic building blocks of all living things. They are tiny structures

Question 27

Organ system

Answer 27

A group of organs with related functions, working together to perform certain functions within the body.