Biology Test

Question 1

How would you look at a prepared slide under the microscope?

Answer 1

1) Put slide on stage under clips
2) Using smallest objective lens, and looking at the side rack your slide as close as you can to the objective lens
3) Look down ocular lens and use coarse focusing knob first
4) Then use fine focusing knob to make image look good and sharp
5) Repeat using medium power
Repeat using high power

Question 2

What is the relationship between magnification and the Field of View?

Answer 2

As the magnification increases, the field of view decreases.

As the magnification decreases, the field of view increases.

Question 3

How many millimetres are in a micrometer?

Answer 3

1mm = 1000Mm

Question 4

Write an equation that shows the action of yeast on glucose.

Answer 4

Yeast

Water + Glucose ——–> Ethanol + CO2

Question 5

What kingdom does yeast belong to?

Answer 5

Fungi kingdom

Question 6

How does yeast reproduce?

Answer 6

By budding.

Question 7

Why do bakers use yeast to make bread?

Answer 7

To make the bread rise. Yeast produces CO2 and CO2 is a gas which makes the bread rise.

Question 8

Why do Brewers use yeast to make beer?

Answer 8

To make the alcohol. The yeast breaks down the glucose (sugar) to make alcohol.

Question 9

Label 12 different parts of a plant cell.

Answer 9

Mitochondria, chloroplast, LARGE vacuole, nucleus , cell wall, cell membrane, nuclear membrane, smooth endoplasmic reticulum, rough endoplasmic reticulum, gogli complex, ribosomes, cytoplasm.

Question 10

Name 3 parts of a plant cell which are not in an animal cell.

Answer 10

Chloroplasts, LARGE vacuole, cell wall.

Question 11

What do the mitochondria do?

Answer 11

Produces energy for the cell.

Question 12

What do the chloroplasts do?

Answer 12

Site of photosynthesis.

Question 13

What do the endoplasmic reticulum do?

Answer 13

Transports or moves things around the cell.

Question 14

What do the centrioles do?

Answer 14

Controls the movement of chromosomes during mitosis.

Question 15

What do ribosomes do?

Answer 15

Where the protein of the cell is made.

Question 16

What does the nucleus do?

Answer 16

Holds the DNA of the cell and controls the cell.

Question 17

What is the name of the group of animals that are made up of only one cell?

Answer 17

Unicellular organisms.

Question 18

What is mitosis?

Answer 18

A type of cell division that produces 2 daughter cells identical to the parent cell.

Question 19

Name and describe the 5 stages of mitosis.

Answer 19

Interface - normal cell function
Prophase - nuclear membrane disappears, chromosomes do spiral dance thing so become visible, chromosomes make a copy of themselves
Metaphase - chromosome pairs line up in middle of cell, one on each side of middle
Anaphase - chromosome pairs are pulled apart from each other
Telophase - chromosomes unravel and become invisible, neclear membrane reforms, cell splits in half

Question 20

What is a cell organelle?

Answer 20

A part of a cell that has a specific job.

Question 21

Label 11 different parts of an animal cell.

Answer 21

Ribosomes, SMALL vacuoles, nucleus, centrioles, nuclear membrane, smooth endoplasmic reticulum, rough endoplasmic reticulum, cytoplasm, gogli complex, mitochondria, cell membrane.

Question 22

Define the term stem cell.

Answer 22

An unspecialised cell which can change into different types of cells.

Question 23

Name 3 places you will find stem cells.

Answer 23

Bone marrow, umbilical cord or human embryo.

Question 24

Describe 2 ways stem cells have helped human.

Answer 24

1) Can be used for diabetic patients to make insulin producing cells
2) Can be used to grow new organs for people who’s organs are damaged or aren’t working properly.

Question 25

What are ethics?

Answer 25

The principles and values that we hold.

Question 26

Describe 2 negatives associated with stem cells.

Answer 26

1) Use human embryo which can be classified as bad by religious groups as it is living.
2) Companies can make and sell organs with them.

Question 27

What is the difference between identical twins and non - identical twins?

Answer 27

Identical twins have the exact same DNA as each other.

Un-identical twins don’t.

Question 28

Who is said to be the “father” of microscopy and why?

Answer 28

Anton Van-Leeuwenhoek because he was the first person to use curved lenses.

Question 29

Describe 2 ways that microscopes have benefited humans since their invention.

Answer 29

1) Can be used to identify diseases easier.
2) Can be used to fertilise people by taking a sperm and an ovum and putting the sperm inside the ovum and then put the fertilised ovum in the women’s womb.