What is the role of membrane proteins in active transport?

To assist in the movement of substances across a semipermeable membrane

What happens to a cell in a hypotonic solution?

The cell swells from the influx of water

What happens to a cell in a hypertonic solution?

The cell shrinks as water leaves the cell

What drives the movement of water in osmosis?

The differing concentration of water molecules

A solution with lower osmotic pressure than another solution

How do we know that the shape of an enzyme determines its function?

Enzymes are specific to their substrate

Unlike diffusion, active transport moves molecules from areas of low concentration to areas of high concentration. Which of these describes active transport?

Uses energy from ATP to move molecules AGAINST the concentration gradient

How does temperature and pH affect enzymes?

Enzymes are only active in a specific range of temperature and pH

What is the relationship between photosynthesis and cellular respiration?

The products of photosynthesis (sugar and oxygen) are the reactants of cellular respiration.

Which of these is NOT true? Enzymes can denature (change shape) when the temperature gets too high., Enzymes can only be used once in a chemical reaction., Extreme pH can denature enzymes., Enzymes speed up chemical reactions.

Enzymes can only be used once in a chemical reaction.

What is an inhibitor?

substance that can bind to an enzyme and prevent the substrate from binding

What are the reactants (starting materials) in photosynthesis?

light, carbon dioxide, and water

Which of the following is the correct equation for PHOTOSYNTHESIS? Options: CO 2 + O 2 + H 2 O --> Light+ Sugar, O 2 + light + H 2 O --> CO 2 + Sugar, CO 2 + H 2 O + light --> O 2 + Sugar, CO 2 + sugar + H 2 O --> O 2 + light

CO 2 + H 2 O + light --> O 2 + Sugar

What is the main purpose of the light dependent reactions?

To provide the energy for the calvin cycle

If we enclosed a plant in an air-proof bottle, what would happen to the rate of photosynthesis?

Gradually slow down to zero because CO 2 is used up.

How does light intensity generally affect the rate of photosynthesis?

Increases the rate, up to a point

What are the three types of transport that go from high to low concentration?

diffusion, osmosis, facilitated diffusion

What three substances make up the cell membrane?

lipids, proteins, carbohydrates

Y11 cell processes Flashcards

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50 questions

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1.

FLASHCARD QUESTION

Front

What is an isotonic solution?

Back

A solution with equal osmotic pressure and water potential as another solution

2.

FLASHCARD QUESTION

Front

What is the direction of water movement in a hypotonic solution?

Back

From higher to lower concentration

3.

FLASHCARD QUESTION

Front

How is osmosis different from diffusion?

Back

Osmosis occurs across a semipermeable membrane, while diffusion does not.

4.

FLASHCARD QUESTION

Front

Active transport

Back

The movement of substances from lower to higher concentration

5.

FLASHCARD QUESTION

Front

What happens to a cell in an isotonic solution?

Back

The cell remains the same

6.

FLASHCARD QUESTION

Front

What is the role of enzymes in chemical reactions?

Back

To speed up specific chemical reactions

7.

FLASHCARD QUESTION

Front

Osmosis

Back

The movement of solvent molecules through a semipermeable membrane

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