465973
Descripción
Test por mollymalone98, actualizado hace más de 1 año
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Creado por mollymalone98
hace más de 10 años
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Pregunta 1
Pregunta
CYTOPLASM contains ENZYMES that control the CHEMICAL REACTIONS.
Respuesta
- True
- False
Pregunta 2
Pregunta
What is the function of the cell wall?
Respuesta
-
support and strengthen the plant cell
-
to produce proteins
-
where photosynthesis takes place
Pregunta 3
Pregunta
What is the green substance in chloroplasts?
Respuesta
-
chlorophyll
-
cellulose
-
enzymes
-
mitochondria
Pregunta 4
Pregunta
What does the permanent vacuole contain?
Respuesta
-
cell sap (weak solution of sugars and salts)
-
chlorophyll
-
cellulose
Pregunta 5
Respuesta
- True
- False
Pregunta 6
Pregunta
Features of a bacteria cell
Respuesta
-
nucleus
-
mitochondria
-
cytoplasm
-
cell membrane
-
plasmid DNA
-
cell wall
-
vacuole
-
chloroplasts
-
flagella
-
chromosomal DNA (carries most of the genetic information)
Pregunta 7
Pregunta
Yeast cells do not contain ribosomes or mitochondria
Respuesta
- True
- False
Pregunta 8
Pregunta
Both yeast and bacteria are single celled organisms
Respuesta
- True
- False
Pregunta 9
Pregunta
Diffusion is the spreading of particles from a LOW concentration to a HIGH concentration
Respuesta
- True
- False
Pregunta 10
Pregunta
Diffusion only happens in liquids
Respuesta
- True
- False
Pregunta 11
Pregunta
Diffusion only happens in liquids
Respuesta
- True
- False
Pregunta 12
Pregunta
The BIGGER the DIFFERENCE IN CONCENTRATION the FASTER the diffusion rate
Respuesta
- True
- False
Pregunta 13
Pregunta
Dissolved substances can move in and out of cells by DIFFUSION. This is called OSMOSIS
Respuesta
- True
- False
Pregunta 14
Pregunta
Osmosis is the movement of water from a less concentrated solution to a more concentrated solution through a partially permeable membrane.
Respuesta
- True
- False
Pregunta 15
Pregunta
Particles move about randomly, so they move both ways through a semi permeable mebrane in osmosis. This means there is a NET (overall) movement FROM the HIGHER concentration
Respuesta
- True
- False
Pregunta 16
Pregunta
Adaptions of the PALISADE CELL or PHOTOSYNTHESIS
Respuesta
-
Packed with chloroplasts
-
More chloroplasts near the top of the cell so they're nearer the light
-
TALL meaning larger SURFACE AREA for ABSORBING CO2 from the air
-
THIN meaning they can be crammed tightly next to eachother at the top of the leaf
-
Special kidney-shape
-
When the plant has lots of water, the cells become TURGID so the stomata OPEN and gases can be exchanged
-
When the plant is short of water, the cells become FLACCID, making the stomata close, meaning less water vapour escapes.
-
THIN outer walls and THICKER inner walls make the opening and closing work
-
SENSITIVE TO LIGHT - CLOSE AT NIGHT to save water
Pregunta 17
Pregunta
Adaptions of the GUARD CELLS to OPEN and CLOSE PORES (STOMATA)
Respuesta
-
Packed with chloroplasts
-
More chloroplasts near the top of the cell so they're nearer the light
-
TALL meaning larger SURFACE AREA for ABSORBING CO2 from the air
-
THIN meaning they can be crammed tightly next to eachother at the top of the leaf
-
Special kidney-shape
-
When the plant has lots of water, the cells become TURGID so the stomata OPEN and gases can be exchanged
-
When the plant is short of water, the cells become FLACCID, making the stomata close, meaning less water vapour escapes.
-
THIN outer walls and THICKER inner walls make the opening and closing work
-
SENSITIVE TO LIGHT - CLOSE AT NIGHT to save water
Pregunta 18
Pregunta
Guard cells are grouped together at the top of the leaf where most of the photosynthesis happens
Respuesta
- True
- False
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