Biochem lab

A detailed illustration of biochemical processes including enzymes, reactions, and pH indicators in a lab setting, with vibrant colors and engaging educational elements.

Biochemical Lab Quiz

Test your knowledge of biochemistry with our comprehensive quiz! Covering essential concepts related to enzymes, pH levels, and biochemical reactions, this quiz is designed to enhance your understanding and retention of the subject.

Whether you're preparing for exams or just curious about biochemistry, this quiz will provide valuable insights and fun learning experiences.

40 engaging questions
Multiple choice format
Instant feedback on your answers

40 Questions10 MinutesCreated by SynthesizingMolecule47

Act as catalysts that increase the speed or rate at which substances in a cell get converted into other substances

Precipitation test

Enzyme

Both

NOTA

This enzyme reduces the substrate, peroxide, to water and oxygen by the following decomposition reaction

Hydrogen peroxide

Catalase

H2O

The rate of enzyme activity can be monitored by measuring the concentration of hydrogen peroxide consumption or measuring the rate of oxygen gas formation.

TRUE

FALSE

A positive result for the presence of catalase.

Pregnancy

Bubble formation

Boiling bubbles

Catalase dessiccation

The catalase enzyme works best around pH

7.0

7.7-9.5

8.0

9.0

Without the presence of enzymes, the reactions necessary to sustain life would require ___________________ in order to occur.

Higher amount of oxygen

Larger proteins

Higher temperature

Larger cells

The part of the enzyme where the substrate binds is called the

Active slide

Active side

Catalyst

Inhibitor

When a piece of liver is dropped into hydrogen peroxide, the peroxide bubbles vigorously as a result of what reaction?

Peroxide being broken into hydrogen and water

Peroxide being broken into water and oxygen

Iver and peroxide are joining together to make a new protein

Peroxide is destroying germs in the liver

Some people cannot digest milk products because they lack a specific enzyme. Which enzyme would be used to break down the lactose in milk?

Lactose

Lactase

Lactum

Lactacyd

Enzymes are composed of what organic molecule?

Carbohydrates

Lipids

Proteins

Fatty acids

Indicator is also used to measure the pH of a solution because it has a different colour at each pH value.

Universal

Colors

Enzymes

Strength

What type of enzymes that break down fats

Protease

Lipase

Carbohydrates

What type of enzymes that break down protein

Lipase

Protease

Lactase

AOTA

What type of enzyme is amylase

Lipase

Protease

Carbohydrates

NOTA

What affect does extremely high pH have on enzymes?

Destroys them

Denatures them

Destruct them

What does the term optimum mean for enzyme temperature?

The highest temperature before denaturing occurs

The temperature which gives the highest enzyme activity

Which of these statements about enzymes is true?

Temperature does not affect their activity

They work best at low pH

They can be reused

These are proteins that increase the rate of reaction by lowering the energy of activation

Carbohydrates

Proteins

Enzyme

Acids

What happens to litmus paper in acidic solutions?

Blue litmus turns red

Yellow litmus turns green

Red litmus turns blue

Universal indicator solution is usually green to begin with. What does this mean?

Neutral

Active

Alkaline

A liquid has a pH of 8. What does this mean?

It is weakly alkaline

It is acidic

A liquid has a pH of 1. What does this mean?

Strongly acidic

Acidic

Not acidic

The substances that are used to test whether something is acidic or basic

Indicators

Catalyst test

Proton acceptors

Bases can be referred to as:

Proton eliminators

Proton acceptors

Proton

An unknown substance is added to a solution and the pH increases. The substance is:

Neutral

Acidic

Not acidic

Basic

Which substance has the lowest pH

Milktea

Matcha latte

Coffee

Lemon juice

A beaker full of acid is added to a beaker full of base. The pH of the base will:

Change equally

Change rapidly

Change constantly

Acids increase the concentration of what in water?

OH- ions

Hydrogen content

Oxygen content

Hydroxide ions

There are different types of osmotic solutions, and this will include/s the following. EXCEPT

Is the one that has a higher solute concentration inside the cell than outside.

Hypotonic Solution

Isotonic Solution

Hypertonic Solution

Is one that has the same concentration of solutes both inside and outside the cell.

Isotonic Solution

Hypotonic Solution

Hypertonic Solution

Is one that has a higher solute concentration outside the cell than inside.

Hypertonic Solution

Isotonic Solution

Hypotonic Solution

When a substance is placed in a hypotonic solution, the solvent molecules move inside the cell and the cell becomes turgid or undergoes deplasmolysis. This is known as

Endosmosis

Exosmosis

BOTH

NOTA

When a substance is placed in a hypertonic solution, the solvent molecules move outside the cell and the cell becomes flaccid or undergoes plasmolysis. This is known as

Exosmosis

Endosmosis

BOTH

NOTA

Is a biological membrane, which functions by permitting the movements of certain molecules or ions to pass through it.

Osmosis

Diffusion

Semi-permeable membrane

What happens when vit C reacts with iodine

The ascorbic acid is oxidized (looses electrons)

The iodine is reduced

BOTH

A positive color for Ninhydrins test is

Sage green

Gray

Violet

Red

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