IGCSE Biology Paper-3: Specimen Questions with Answers 6 - 8 of 358

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Question 6

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Short Answer▾

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

Explanation

Light Intensity Curve Against Rate of Photosynthesis

Question 7

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Short Answer▾

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 8

Question

MCQ▾

Which is a plasmolysis cell?

Choices

Choice (4)

a.

Finding a Plasmolysis

b.

Finding Plasmolysis Choice B

c.

Finding Plasmolysis Choice C

d.

Finding Plasmolysis Choice D

Answer

d.

Explanation

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

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