Unit 3 L3 Btec Applied science NQF

1.

Multiple Choice

30 sec

1 pt

Definition of a hypothesis

A prediction, based on scientific ideas, made as a starting point for further investigation

A prediction which states that there is no relationship between two variables or no difference among groups.

A scientific question that requires an answer

A scientific observation

2.

Multiple Choice

30 sec

1 pt

Definition of a null hypothesis

A prediction which states that there is no relationship between two variables or no difference among groups.

A prediction, based on scientific ideas, made as a starting point for further investigation

A scientific observation

A scientific question that requires an answer

3.

Multiple Choice

30 sec

1 pt

What is an independent variable?

The variable that may change as result of the changing independent variable. This is the variable you measure.

Variables that need to be kept constant

The variable being changed in an investigation.

The method to be followed

4.

Multiple Choice

30 sec

1 pt

What is a dependent variable

A method to be followed

The variable being changed in an investigation.

Variables that need to be kept constant.

The variable that may change as result of the changing independent variable. This is the variable you measure.

5.

Multiple Choice

30 sec

1 pt

What is a control variable?

The method being followed

Variables that need to be kept constant.

The variable that may change as result of the changing independent variable. This is the variable you measure.

The variable being changed in an investigation.

6.

Multiple Choice

30 sec

1 pt

What does quantitative mean?

Observations made without using numbers.

Data which involves using numbers.

Recordings made of colour

Recordings made of physical changes

7.

Multiple Choice

30 sec

1 pt

What does qualitative mean?

Measurements involving mass

Measurements involving volume

Data which involves using numbers.

Observations made without using numbers.

8.

Multiple Choice

30 sec

1 pt

In science what does accuracy mean in terms of data?

When results are repeated

How precisely the measurement is taken.

How close the readings are to the actual values.

When results are valid

9.

Multiple Choice

30 sec

1 pt

What is this formula showing?

T-Test

Standard deviation

Mean

Chi squared test

10.

Multiple Choice

30 sec

1 pt

What does the formula show?

Standard deviation

t-test

chi squared

mean

11.

Multiple Choice

30 sec

1 pt

What does the formula show?

t-test

mean

chi squared

standard deviation

12.

Multiple Choice

30 sec

1 pt

What does this symbol mean?

divide

multiply

excellent

sum of

13.

Multiple Choice

30 sec

1 pt

What does the O stand for?

optional

outlier

observed

zero

14.

Multiple Choice

30 sec

1 pt

What does the E stand for?

example

endless

expected

exact

15.

Multiple Choice

30 sec

1 pt

What does the S standard for?

Sample

Standard

Seven

Sign

16.

Multiple Choice

30 sec

1 pt

What does the n stand for?

nine

number

none

number of terms

17.

Multiple Choice

30 sec

1 pt

What is this number?

103

100

10000

1000

18.

Multiple Choice

30 sec

1 pt

What does the prefix Mega mean?

million

millionth

thousand

millimeter

19.

Multiple Choice

30 sec

1 pt

What does the prefix centi mean?

100th

10th

1000th

10000th

20.

Multiple Choice

30 sec

1 pt

What does the prefix micro mean?

1 thousandth

1 hundredth

1 millionth

10 hundredth

21.

Multiple Choice

1 min

1 pt

Enzymes are an example of

Lipids

Carbohydrate

Protein

Nucleic Acid

22.

Multiple Choice

2 mins

1 pt

Enzymes are capable of increasing the rate of a chemical reaction within a living cell. Enzymes accomplish this through which of the following means?

reducing the number of products

reducing the activation energy

increasing the temperature of the cell

increasing the concentration of reactants

23.

Multiple Choice

1 min

1 pt

Each enzyme only has 1 substrate that will fit its active site. What is this called?

reusable

catalyst

specific

fragile

24.

Multiple Choice

1 min

1 pt

What 3 letters do enzymes typically end in?

-ose

-ase

-ese

-tic

25.

Multiple Choice

1 min

1 pt

Any substance that is acted upon by an enzyme is called a(n)?

Coenzyme

Substrate

Vitamin

Polypeptide

26.

Multiple Choice

1 min

1 pt

In the diagram, what is letter A?

product

substrate

enzyme-substrate complex

active site

27.

Multiple Choice

1 min

1 pt

Letter D...

active site

enzyme

substrate

products

28.

Multiple Choice

1 min

1 pt

Letter B...

active site

enzyme

substrate

products

29.

Multiple Choice

1 min

1 pt

Letter C...

active site

enzymes

substrate

products

30.

Multiple Choice

1 min

1 pt

Based on the graph, what is the optimal temperature for this enzyme?

15^oC

40^oC

30^oC

35^oC

31.

Multiple Choice

20 sec

1 pt

At high temperatures enzyme activity declines because of:

Denaturation

Decreased Kinetic Motion

Increased H-Bonding

Dissociation of Ionic Compounds

32.

Multiple Choice

20 sec

1 pt

At low temperatures enzyme activity declines because of:

Denaturation

Decreased Kinetic Motion

Increased H-Bonding

Dissociation of Ionic Compounds

33.

Multiple Choice

1 min

1 pt

What is the name for the mechanism of enzyme activity?

Lock and key

jigsaw puzzle

hammer and nail

two hands pattern

34.

Multiple Choice

1 min

1 pt

Which of the following conclusions can be drawn from this graph?

The optimum pH of the enzyme is 6.6.

The optimum pH of the enzyme is 5.8

The enzyme’s activity increases as pH increases 5.0 to 9.0

The enzyme’s activity is greater around pH of 8.0 .

35.

Multiple Choice

45 sec

1 pt

Enzymes are composed of which of the following monomers?

amino acids

carbohydrates

nucleotides

monosaccharides

36.

Multiple Choice

30 sec

1 pt

What do we know about the enzyme's structure if the enzyme is in its optimum pH

the enzyme structure is not denatured, meaning that the active site is still in tact

the enzyme structure is not denatured, meaning that the active site is changed

the enzyme structure is denatured

37.

Multiple Choice

30 sec

1 pt

What temperature do you think our enzymes will work the best at?

room temperature, 25 degrees

0 degree

50 degrees

37 degrees

38.

Multiple Choice

45 sec

1 pt

Which of the factors does NOT affect enzymatic activity?

Temperature

pH

Concentration

Color

39.

Multiple Choice

2 mins

1 pt

Enzyme A digests proteins in the stomach (environment with a pH of 2). Enzyme B digests proteins in the small intestine (environment with a pH of 8). Which of the following is NOT true:

Enzyme A would be denatured in the small intestine.

Enzyme A works best in acidic conditions.

Enzyme A can also work in the small intestine.

Enzyme A helps in the hydrolysis of proteins.

40.

Multiple Choice

30 sec

1 pt

What would happen to the rate of reaction if more substrate added to the solution at point C

increase reaction rate

decrease reaction rate

no change in reaction rate

41.

Multiple Choice

30 sec

1 pt

What would happen to the rate of reaction if more enzyme added to the solution at point C

increase reaction rate

decrease reaction rate

no change in reaction rate

42.

Multiple Choice

30 sec

1 pt

What is a Belt Transect?

A way of sampling a changing habitat

A way of sampling a non-changing habitat

A way of keeping up your pants

43.

Multiple Choice

30 sec

1 pt

What is the best way to place a quadrat?

Place it where you like

Divide the sample area into a grid and use a random number generator to choose a square.

Throw the quadrat so it's random

Divide the sample area into a grid and choose a square.

44.

Multiple Choice

30 sec

1 pt

What is the pH range of enzyme A?

2

0-3.7

3.7

0

45.

Multiple Choice

30 sec

1 pt

Which enzyme is most efficient in a basic solution?

A

B

46.

Multiple Choice

30 sec

1 pt

What is the optimal pH of enzyme A?

8

2

5.7-10

10

47.

Multiple Choice

15 mins

1 pt

Find the mode:
5, 0, 9, 9, 3, 0, 5, 5, 4

9

5

3

7

48.

Multiple Choice

15 mins

1 pt

When finding the median, what do you do if there are two middle numbers?

Add them together and divide by 2

Write them both as the answer

Give up

Pick one

49.

Multiple Choice

30 sec

1 pt

What is the first thing you should do before finding the median or the mode?

Start crossing numbers off

Put numbers in order from least to greatest

List the numbers how they are

Look for repeats

50.

Multiple Choice

30 sec

1 pt

Anomalous results are...

crossed out

always included in the calculation of the mean (average)

excluded from the mean

included in the mean sometimes

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