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Edexcel GCSE Biology - Foundation > Key Concepts Of Biology > Flashcards

Flashcards in Key Concepts Of Biology Deck (50)
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1

What are all living things made of?

Cells

2

What’s the difference between prokaryotic and Eukaryotic Cells?

-Eukaryotic Cells are complex

- Prokaryotic cells are Smaller and simpler

3

Name 2 eukaryotic cells

Animal and Plant cells

4

Name a prokaryotic Cells

Bacteria Cells

5

What is a sub cellular structures

It is the different part of a cell

6

Name 5 sub-cellular structures in an Animal Cells and what is their function

Nucleus- Contains DNA which Controls the cells- Stored in structures called chromosomes

Cytoplasms- where most chemical reactions happens

Cell membrane- Holds the cell together and controls what goes in and out

Mitochondria- where aerobic respiration
happens, releases energy for the cell

Ribosomes-join amino acids together to make protein

7

Plant cells have the same 5 sub cellular structures as the animal plants but there are 3 more what are they and what it’s function

Cell wall- Made of Celluose and supports the cell and strengths it

Chloroplasts- where photosynthesis happens, which makes food for plants

Vacuole- stores a cell sap

8

What does a bacterial cell have the an animal and plant cell doesn’t have

Flagellum
Plasmid DNA
Chromosal DNA

9

What is a specialised Cells

Cells with a structure that makes them to its job

10

What are egg and sperm cells specialised for

Specialised for reproduction

11

What happens to the egg and sperm cell in sexual reproduction

-Egg and sperm cell combine
-Creates a fertilised egg which develops into an embryo

12

What is the function of the egg cell and Sperm cells

Egg cells-Carry female DNA and feed the embryo

Sperm cells- Carry Male DNA to the egg

13

What does and egg cell have?

Cell membranes
Nucleus
Cytoplasms

14

What does a sperm cell have and what’s it’s function

Tail- Swims to the egg

Acrosome- stored enzymes that digest through membrane

Nucleus

15

What are cilliated epithelial Cells specialised for

Specialised for moving material

16

What is the function of cilia

They move substances by beating them along the surface of the tissue

17

What does some epilthelial cells contain

Cillia at the top surface of a cell

18

How are Cells studied

Using a microscope

19

What is the difference between a light and electron microscopes

Light microscopes can let you see different part of a cell

Electron microscopes male specimen look bigger and show more detail

20

What is the formula for magnification





Image size = image size
——————
Real Size

21

What is the equation for total magnification






Total Magnification = eyepiece lens x objective
lens

22

What are Enzymes

Catalysts produced by Living things

23

What does the word Biological catalyst mean

They speed but electrical reactions in living organisms

24

What is a substrate

A molecule that gets changed in a chemical reaction

25

What is the active site

The part where it joins on its substrate to catalyse the reaction

26

Enzymes are a substrate specific what does that mean

Means they only work with one substrate

27

Why do enzymes have a specific substrate?

For the enzyme to work it has to fit into the active site

28

What do enzymes catalyse

They catalyse breakdown and synthetic reactions

29

Proteins,lipids and some carbohydrates are what type of molecules

They are Big Molecules

30

What organisms need to break down and give an example

Organisms often need to break down big molecules into smaller ones e.g. digestion