CIE Biology Paper-3: Specimen Questions 6 - 8 of 230

Question number: 6

Short Answer Question▾

Write in Short

Draw the graph between light intensity and the rate of photosynthesis process

Explanation

 Light intensity curve against rate of photosynthesis

Light intensity curve against rate of photosynthesis

Graph shows that without enough light, a plant cannot photosynthesize very fatly, even if there is enough water and CO2. Increasing the light intensity will boost the speed of photosynthesis.

Question number: 7

Short Answer Question▾

Write in Short

Homeostasis is the property of a system in which variables are regulated so that internal conditions remain stable and relatively constant.

What are the sensors, controllers and effectors of homeostasis?

Explanation

Sensors: Sense environmental information inner and outer of the body. Such type of sensor may be nervous receptor cells, cytoplasmic or membrane proteins.

Controllers: Cause processing and interpreting information received from the sensors.

Effectors: Commanded by the controllers that have the function of carrying out actions that in fact regulate and maintain the equilibrium of the body, including in muscles, glands, cellular organelles, etc. & structures that participate in genetic translation, proteins synthesis, etc. , on the molecular level.

Question number: 8

MCQ▾

Question

Which is a plasmolysis cell?

Choices

Choice (4) Response
a.
finding a image of plasmolysis

finding a image of plasmolysis

solutions of plasmolysis

b.
Finding image of plasmolysis choice B

Finding image of plasmolysis choice B

shows image of plasmolysis

c.
Finding image of plasmolysis choice C

Finding image of plasmolysis choice C

shows image of plasmolysis

d.
finding image of plasmolysis choice D

finding image of plasmolysis choice D

shows image of plasmolysis

Answer

d.

Explanation

Plasmolysis is the reverse process of cytolysis in which cells lose water in a hypertonic solution.

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