Topic 1 - Key Concepts in Biology COMPLETE PK Flashcards Preview

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Flashcards in Topic 1 - Key Concepts in Biology COMPLETE PK Deck (191)
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1

What does a microscope do?

Makes small objects appear larger/magnifies small objects

2

What part of a microscope do you look through?

eyepiece lens

3

Which part of a microscope do you use to get a clear image?

the focusing wheel

4

If an average height person in Year 10 is magnified 600 times, how tall will they be compared to the tallest building in the world, which is 828 m tall?

about the same height; the Burj Khalifa, Dubai is 828 m tall

5

Put these in order of size, biggest first: atom, animal cell, cell nucleus, muscle tissue, protein molecule, water molecule

muscle tissue, animal cell, cell nucleus, protein molecule, water molecule, atom

6

A microscope has a ×5 eyepiece lens and a ×5 objective lens. What is the total magnification?

×25; 5 × 5 = 25

7

A human hair has a width of 100 μm but appears 20 mm wide in a photo. What magnification is the photo?

×200; 20 mm = 20 000 μm; 20 000 ÷ 100 = 200

8

How many millimetres are there in a metre?

1000

9

What unit is 1000 times smaller than a millimetre?

micrometre, μm

10

What is the unit symbol for a nanometre?

nm

11

What is an estimation?

an approximate value

12

Name one part you could find in a plant cell but not an animal cell.

cell wall, chloroplasts, permanent vacuole

13

What process happens in a mitochondrion?

aerobic respiration

14

What is one function of a plant cell’s permanent vacuole?

to help keep the cell rigid/to store substances

15

In which part of a plant cell is cell sap stored?

vacuole

16

In which part of a cell would you find chromosomes?

Nucleus

17

When you look down a microscope, what is the area that you see called?

field of view

18

Why can an electron microscope detect smaller structures in cells than a light microscope?

it has better magnification and better resolution

19

What is a picture taken with a microscope called?

micrograph

20

Some microscope pictures have a small line drawn on them with information about how long the line is when unmagnified. What is this line called?

scale bar

21

List three sub-cellular structures that are usually found in animal cells.

any three from: cell membrane, nucleus, mitochondria,

22

List three sub-cellular structures found in plant cells but not in animal cells.

large permanent vacuole, chloroplasts, cell wall

23

Which cell structure controls what enters and leaves the cell?

cell membrane

24

Which cell structure controls how the cell works?

nucleus

25

In which cell structure does respiration mainly take place?

Mitochondria

26

Which plant cell structure contains chlorophyll?

Chloroplast

27

What is the function of the cell structure that contains chlorophyll?

to capture energy from light for photosynthesis/to produce glucose using photosynthesis

28

Describe the function of the structure that surrounds plant cells, but not animal cells.

supports and protects the cell

29

What is the function of ribosomes?

manufacture of proteins

30

What are gametes?

Sex cells