Biochem lab
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
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
O2
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 carbohydrates
Lipase
Protease
Carbohydrates
AOTA
NOTA
What type of enzymes that break down fats
Protease
Lipase
Carbohydrates
What type of enzymes that break down lipase enzymes
Lipase
Proteins
Carbohydrates
NOTA
AOTA
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
Isotonic Solution
Hypertonic Solution
Hypotonic Solution
NOTA
AOTA
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
The factors affecting the rate of osmosis include
Pressure
Temperature
Surface area
Water potential
AOTA
A & B only
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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