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Questions and Answers
What is NOT a component of the cell membrane?
What is NOT a component of the cell membrane?
- Phospholipid
- Mitochondria (correct)
- Cholesterol
- Glycoprotein
Which of the following is a function of the nucleus?
Which of the following is a function of the nucleus?
- Transporting materials
- Controlling all activities inside the cell (correct)
- Providing structural support
- Synthesizing proteins
How many pairs of chromosomes are present in human cells?
How many pairs of chromosomes are present in human cells?
- 22 pairs
- 21 pairs
- 23 pairs (correct)
- 24 pairs
What characteristic best describes neuron cells?
What characteristic best describes neuron cells?
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Which component is found inside the cell?
Which component is found inside the cell?
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Study Notes
Cell Membrane Structure
- The outer layer of the cell membrane consists of membrane proteins, glycoprotein, cholesterol, and phospholipid.
- The inner layer of the cell membrane borders the cytoplasm.
The Nucleus
- The nucleus is the control center of the cell, directing all cellular activities.
- The nucleus contains genetic material in the form of DNA (deoxyribonucleic acid) and RNA (ribonucleic acid).
Human Cells
- Human cells have 23 pairs of chromosomes, totaling 46 chromosomes.
- The 23 pairs of chromosomes consist of 22 pairs of somatic chromosomes and 1 pair of sex chromosomes.
Cell Shape and Function
- Cell shape varies according to tissue function.
- Neuron cells are long, allowing them to transmit signals throughout the body.
- Blood cells are small, enabling them to pass through capillaries.
- Fibrous tissue cells are elongated and elastic, allowing them to withstand deforming forces.
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