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