Esme Biology paper 1 rps

Microscope

100

Fill in the blanks

Place a thin sample of ___ (e.g., onion epidermis) onto a microscope ___.

1. Tissue

2. Slide

200

Fill in the blank

Add a drop of stain (e.g., ___ for plant cells).

Iodine

300

Fill in the blanks

Carefully place a ___ on top, avoiding ___ _____.

- coverslip

- air bubbles

400

Fill in the blanks

Adjust the microscope to low ____ and focus the image.

Power

500

Fill in the blank

Increase ______ and refocus as needed.

Magnification

600

Fill in the blanks

Draw and ___ the observed cells, including a ___

- Label

- Scale

700

Fill in the blank

Magnification = Size of image / ______

Actual size of object

800

Fill in the blank

There are _______ nanometres in 1 millimetre

1,000,000

Culturing microorganisms

100

Choose the correct answer!!!!!!

First, you prepare ____ with bacterial culture.

A. An agar plate

B. A conical flask

C. A microscope slide

D. A plate

A. An agar plate

200

Choose the correct answer!!!!!!

Next, soak ____ in different antiseptics or antibiotics.

A. Kitchen roll

B. Litmus paper

C. Filter paper discs

D. Toilet paper

C. Filter paper discs

300

Choose the correct answer!!!!!!

Place the discs on the agar plate using ____ forceps.

A. Metal

B. Sterilised

C. Long

D. Hot

B. Sterilised

400

Choose the correct answer!!!!!!

Incubate the plate at __°C for 48 hours.

A. 0

B. 37

C. 30

D. 25

D. 25

500

Choose the correct answer!!!!!!

Measure the zone of ___ around each disc.

A. Bacteria

B. Inhibition

C. Bad stuff

D. Sample

B. Inhibition

600

Choose the correct answer!!!!!!

____ the effectiveness by calculating the area of inhibition.

A. Compare

B. Describe

C. Explain

D. Show

A. Compare

700

Choose the correct answer!!!!!!

What is the equation for the area of a circle.

(π is the symbol for pi gone dodgy)

A. 2πr

B. Length x Width

C. πr²

D. Base x Height x 0.5

C. πr²

800

Choose the correct answer!!!!!!

Why do we have to incubate the plate at 25°C (in schools).

A. So the bacteria don't die.

B. Because that's the temperature of the room.

C. So the bacteria don't overheat.

D. To prevent harmful bacteria from growing.

D. To prevent harmful bacteria from growing.

Osmosis

100

True or False.

We cut the potato into random shapes.

False!!!

We cut identical potato cylinders.

200

True or False.

We measure and record the mass of the solutions.

False!!!!

Measure and record the potato's initial masses.

300

True or False.

Place each cylinder into different concentrations of sugar or salt solution.

True!!!!

400

True or False.

We leave them for only a minute.

False!!!

Should probably leave them for a set period (e.g., 24 hours).

500

True or False.

Remove and measure final masses.

False!!!!

We must also pat them dry before measuring the final masses.

600

True or False.

You then calculate percentage change in mass.

True!!!!