SB1: Key Concepts In Biology Flashcards Preview

GCSE Biology - Paper 1 + 2 Quick Questions (ones got wrong) > SB1: Key Concepts In Biology > Flashcards

Flashcards in SB1: Key Concepts In Biology Deck (157)
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1

What are prokaryotic cells?

Small, simple cells without a nucleus

2

What are prokaryotes?

Single-celled prokaryotic organisms

3

What are eukaryotic cells?

Complex cells that contain nucleus and other sub cellular structures

4

What is the role of the nucleus?

Controls activities of the cell

5

Name the sub cellular structure where respiration takes place

Mitochondria

6

Which stage of protein synthesis are ribosomes involved in?

Second stage (translation)

7

What is the function of the cell wall?

A rigid structure that supports and strengthens plant cells

8

What is cell sap made from?

Weak solution of sugar and salts dissolved in water

9

What is the function of the solution contained inside the vacuole?

To maintain internal pressure of a cell, to provide support

10

What is the function of the chlorophyll contained inside chloroplasts?

To absorb light energy needed for photosynthesis

11

Name the parts of a bacterial cell

~ cytoplasm
~ cell membrane
~ cell wall
~ singular circular strand of chromosomal DNA
~ plasmid DNA
~ flagellum
~ ribosomes

12

Name the part of a bacterial cell that controls the cells replication

Singular circular strand of chromosomal DNA

13

Name the small loops of DNA found in many bacterial cells

Plasmids

14

What type of information is contained within the plasmids?

Drug resistance

15

Describe what a flagellum is

Long hair-like structures

16

Give two reasons why bacterial cells find it beneficial to have a flagellum

(1) move towards areas of beneficial condition eg. Those high in nutrients and oxygen
(2) can move away from areas of harmful conditions eg. Chemicals, heat

17

Explain why multicellular organisms contain many different types of cells

Each individual cell cannot carry out every life process so cells become specialised to do different jobs

18

What word is used to describe these different types of cells?

Specialised

19

What is the structure of each type of cell related to?

It’s specific function

20

Name the four types of animal cells that you need to know how their structure s linked to their specific function

~ egg cell
~ sperm cell
~ small intestine cell
~ ciliated epithelial cell

21

Name five adaptations of a sperm cell

~ long tail
~ streamlined shape
~ mitochondria concentrated area at base of tail
~ acrosome
~ haploid nucleus of male DNA

22

Name the adaptation that propels a sperm cell forward

The tail

23

Name the adaptation that provides the energy for the tail

Mitochondria concentrated area at base of tail

24

Name the adaptation that makes it easier for a sperm cell to move

Streamlined shape

25

Name the part of the sperm cell that contains enzymes

Acrosome

26

What is the function of the enzymes found in the acrosome?

To digest the cell membrane of the egg

27

Where is the acrosome found?

In the front tip of the head

28

What is the function of a sperm cell?

To transport male DNA to female DNA found in the egg

29

Name three adaptations of the egg cell

~ high nutrient content
~ haploid nucleus
~ cell membrane can change structure

30

Name one adaptation that both sperm cells and egg cells share?

Haploid nucleus