1 (a) (i) The organelle labelled X controls the activities of the white blood cell - Edexcel - GCSE Biology Combined Science - Question 1 - 2021 - Paper 1
Question 1
1 (a) (i) The organelle labelled X controls the activities of the white blood cell. What is the name of organelle X?
A mitochondrion
B ribosome
C chromosome
D n... show full transcript
Worked Solution & Example Answer:1 (a) (i) The organelle labelled X controls the activities of the white blood cell - Edexcel - GCSE Biology Combined Science - Question 1 - 2021 - Paper 1
Step 1
What is the name of organelle X?
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Answer
The organelle labelled X is known as the nucleus. The nucleus controls the activities of the white blood cell, regulating gene expression and thereby ensuring cellular functions.
Step 2
Red blood cells contain the substance...
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Answer
Red blood cells contain the substance haemoglobin.
Step 3
Blood plasma is a...
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Blood plasma is a liquid.
Step 4
Describe two ways that white blood cells protect the body from disease.
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Answer
White blood cells protect the body from disease in several ways:
Phagocytosis: White blood cells such as macrophages engulf and digest pathogens (like bacteria) through a process called phagocytosis. They recognize foreign invaders and help eliminate them from the body.
Antibody Production: B-cells (a type of white blood cell) produce antibodies that specifically target and neutralize pathogens, marking them for destruction and preventing them from causing further harm.
