9022767
Descrição
Questão 1
Questão
The membrane of the vacuole is called the [blank_start]tonoplast[blank_end]. A young plant cell will have many [blank_start]small[blank_end] vacuoles, while a mature plant cell will typically have [blank_start]one[blank_end] big vacuole.
Responda
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tonoplast
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small
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one
Questão 2
Questão
Choose the correct statements about vacuoles.
Responda
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They are produced by the Golgi and associated endoplasmic reticulum.
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They regulate cell turgor.
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They store ribosomes for protein synthesis.
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They store primary and secondary metabolites.
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They contain hydrolytic digestive enzymes.
Questão 3
Questão
Secondary metabolites are growth associated.
Responda
- True
- False
Questão 4
Questão
Which of these is not a primary metabolite?
Responda
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Inorganic ions
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Organic acids
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Sugars
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Lipids
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Amino acids
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Proteins
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All of these are primary metabolites.
Questão 5
Questão
Choose the incorrect statement about secondary metabolites.
Responda
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Latex is a secondary metabolite used to deter insects.
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Secondary metabolites can be for defense or for signalling.
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Raphides (crystallised calcium oxalate) are a secondary metabolite used to deter larvae.
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Aloe contains latex in vacuoles.
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None of these are incorrect.
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Vincristine and vinblastine are secondary metabolites used to attract pollinators.
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Anthocyanin is a secondary metabolite which is a pigment.
Questão 6
Questão
The vacuole can degrade macromolecules and organelles in a process very similar to the lysosomes found in plant cells.
Responda
- True
- False
Questão 7
Questão
High concentrations of solutes in the vacuole give it a [blank_start]positive[blank_end] osmotic potential. This results in water [blank_start]uptake[blank_end] via osmosis as water moves freely through the tonoplast. The cell wall enables water uptake without [blank_start]bursting[blank_end], creating turgor pressure. [blank_start]Loss[blank_end] of turgor pressure results in wilting but will generally not damage the plant in the long term.
Responda
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positive
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negative
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uptake
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loss
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bursting
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loss of rigidity
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Loss
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Gain
Questão 8
Questão
Chloroplast DNA (ctDNA) is linear.
Responda
- True
- False
Questão 9
Questão
Match the plastids to their function:
[blank_start]Chloroplasts[blank_end] carry out photosynthesis.
[blank_start]Chromoplasts[blank_end] manufacture and store pigments.
[blank_start]Leucoplasts[blank_end] store starch/assimilates.
[blank_start]Proplastids[blank_end] can differentiate into other plastids.
Responda
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Chloroplasts
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Chromoplasts
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Leucoplasts
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Proplastids
Questão 10
Questão
Light reactions take place in the stroma. Dark reactions/the Calvin Cycle take place in the thylakoids/Granum.
Responda
- True
- False
Questão 11
Questão
The oxygen released from photosynthesis comes from CO2 in the Calvin cycle.
Responda
- True
- False
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