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Questions and Answers
All organisms are composed of structural and functional units of life called 'atoms'.
All organisms are composed of structural and functional units of life called 'atoms'.
False (B)
The human body is made up of about 50 trillion cells.
The human body is made up of about 50 trillion cells.
False (B)
Unicellular organisms include plants and animals.
Unicellular organisms include plants and animals.
False (B)
Cells vary in size but not in structure as they all perform the same functions.
Cells vary in size but not in structure as they all perform the same functions.
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Modern cell theory states that hereditary information is passed on from cell to cell during cell division.
Modern cell theory states that hereditary information is passed on from cell to cell during cell division.
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According to modern cell theory, all cells have different chemical compositions.
According to modern cell theory, all cells have different chemical compositions.
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Most cells are visible to the naked eye without the use of a microscope.
Most cells are visible to the naked eye without the use of a microscope.
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A cell must have a low surface area to volume ratio for efficient nutrient intake.
A cell must have a low surface area to volume ratio for efficient nutrient intake.
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The size of a human RBC is around 5 nanometers.
The size of a human RBC is around 5 nanometers.
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The largest cell in the human body is the sperm cell.
The largest cell in the human body is the sperm cell.
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Nerve cells have short extensions (axons and dendrites) to help pass signals quickly through the body.
Nerve cells have short extensions (axons and dendrites) to help pass signals quickly through the body.
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Eukaryotic cells do not contain any internal structures called organelles.
Eukaryotic cells do not contain any internal structures called organelles.
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The DNA in prokaryotic cells is coiled up in a region of the cytoplasm called the nucleoid.
The DNA in prokaryotic cells is coiled up in a region of the cytoplasm called the nucleoid.
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Prokaryotic cells have a true nucleus.
Prokaryotic cells have a true nucleus.
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Most bacterial cell walls are made out of cellulose.
Most bacterial cell walls are made out of cellulose.
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The cell wall of bacterial cells assists in retaining moisture.
The cell wall of bacterial cells assists in retaining moisture.
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The plasma membrane surrounds the cell's cytoplasm.
The plasma membrane surrounds the cell's cytoplasm.
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Cytoplasm is composed mainly of lipids.
Cytoplasm is composed mainly of lipids.
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Peripheral proteins are primarily involved in translocating substances across the membrane.
Peripheral proteins are primarily involved in translocating substances across the membrane.
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Integral proteins are only attached to the internal surface of the membrane.
Integral proteins are only attached to the internal surface of the membrane.
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The cytoplasm is a colourless gel-like fluid that fills the area between the cell membrane and the nucleus.
The cytoplasm is a colourless gel-like fluid that fills the area between the cell membrane and the nucleus.
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Fatty acids, amino acids, and carbohydrates are present in the cytosol.
Fatty acids, amino acids, and carbohydrates are present in the cytosol.
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Cytosol makes up approximately 50% of a cell's total volume.
Cytosol makes up approximately 50% of a cell's total volume.
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Chemical reactions in prokaryotes primarily occur in the nucleus.
Chemical reactions in prokaryotes primarily occur in the nucleus.
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The nucleus is often referred to as the 'powerhouse' of the cell.
The nucleus is often referred to as the 'powerhouse' of the cell.
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Red blood cells have multiple nuclei.
Red blood cells have multiple nuclei.
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The outer membrane of the nucleus is called the nuclear envelope.
The outer membrane of the nucleus is called the nuclear envelope.
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The nucleoplasm is a solid substance that supports the nucleus.
The nucleoplasm is a solid substance that supports the nucleus.
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Chromatin is a small molecule that composes the genetic material of a cell.
Chromatin is a small molecule that composes the genetic material of a cell.
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The nucleolus is the smallest structure found in the nucleus.
The nucleolus is the smallest structure found in the nucleus.
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