Damage to villi & microvilli means:

Less surface area for nutrient absorption

A biological catalyst operates best in what conditions?

aprox 37 degrees celsius, neutral pH

A tree damaged due to ringbarking will find it difficult to:

Deliver sugars to areas below the ringbarking

Decreased concentrations of NAD/NADH in the cells would result in:

Decreased ability for electron chain transfer, fatigue

Damage to villi & microvilli can cause diarrhea by decreasing the surface area for absorption &

increasing solute concentration in the gut

Analyse graph. How does an inhibitor work?

It clogs the active site of the substrate.

Analyse the graph. Why are enzymes so important?

They speed up the rate of reaction

Analyse this graph. Why does the graph flatten out after a period of time?

Depletion of substrate/buildup of substrate-enzyme complexes

A tree that has been ringbarked will not be able to:

Perform cellular respiration in cells starved of sugar.

What factors affect enzyme activity?

Depletion of substrate will cease reaction

In the cross section of a stem, the phloem are always:

Found closest to the circumference

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Functioning systems

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A #Unit1 #VCE #Biology #Copperfield #Sydenham quiz about functioning systems (Plant vascularity and Digestive system)

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Questions 17

Answers

1
The rate of transpiration is decreased by:
Increased humidity
Increased temperatures
All of the above
Increased wind speed
2
In the cross section of a stem, the xylem are:
Found closer to the circumference
Found closer to the centre
Always found on the outside
Not found at all
3
Damage to villi & microvilli means:
More surface area for nutrient absorption
Less surface area for nutrient absorption
Net movement of water out of the gut
Net movement of solutes out of the gut
4
A biological catalyst operates best in what conditions?
aprox 37 degrees celsius, neutral pH
100 degrees celsius, neutral pH
38 degrees celsius, pH 7.8
36 degrees celsius, pH 6.8
5
A tree damaged due to ringbarking will find it difficult to:
Deliver water to areas below the ringbarking
Deliver water to areas above the ringbarking
Deliver sugars to areas above the ringbarking
Deliver sugars to areas below the ringbarking
6
Decreased concentrations of NAD/NADH in the cells would result in:
Increased rate of photosynthesis
Decreased ability for electron chain transfer, fatigue
Increased rate of cellular respiration
Increased ability for electron chain transfer more energy
7
Damage to villi & microvilli can cause diarrhea by decreasing the surface area for absorption &
Increasing water absorption
Increasing nutrient absorption
increasing solute concentration in the gut
Decreasing solute concentration in the gut
8
Why is it necessary for leaf cells to be close to "veins"?
So water can escape from the stomata on the leaves
All of the above.
To carry away the products of photosynthesis
To ensure wastes can be removed quickly
9
Any compound which aids in the breakdown of food in organisms is called:
A catalyst
An enzyme
A substrate enzyme complex
A substrate
10
Analyse graph. How does an inhibitor work?
It decreases the pH for the reaction.
It speeds up the rate of reaction.
It increases the optimum temperature for the reaction
It clogs the active site of the substrate.
11
Analyse the graph. Why are enzymes so important?
They decrease the amount of time
They speed up the rate of reaction
All of the above.
They increase the amount of product
12
Analyse this graph. Why does the graph flatten out after a period of time?
Decreased pH
Depletion of substrate/buildup of substrate-enzyme complexes
Depletion of enzyme
Increased temperature
13
A tree that has been ringbarked will not be able to:
Perform photosynthesis
Perform cellular respiration in cells starved of sugar.
Deliver water to the roots
Deliver water to the leaves
14
What factors affect enzyme activity?
Increased temperature will increase reaction rate linearly
Depletion of enzyme will cease reaction
Buildup of enzyme-substrate complexes will cease reaction
Depletion of substrate will cease reaction
15
The rate of transpiration is increased by:
Decreased himidity
Increased winds
Increased temperatures
All of the above
16
If a tree is ringbarked, the structures most likely to be damaged are:
The phloem
The xylem
The bark
The pith
17
In the cross section of a stem, the phloem are always:
Not found at all
Found closest to the circumference
Found closest to the centre
Bigger than the xylem

Functioning systems Flashcards | StudBud