Biomolecules and Cell Basics

1. The major principles of the cell theory include all the following except –

• All organisms are made of cells.

• The cell is the most basic unit of life.

• The atom is the most basic unit of matter.

• All cells come from existing cells.

Which of the following would a plant cell have, but not an animal cell?

• Chloroplasts

• DNA

• Membrane-bound organelles

• Mitochomdria

The diagram shows a unicellular organism with free-floating circular DNA, a plasma membrane and a cell wall. What is most likely this type of cell?

• plant cell

• Animal cell

• Virus

• Bacterial cell

On which of the following organelles are proteins synthesized?

• Mitochondria

• Ribosomes

• Chloroplasts

• Lysosomes

Which structure is the boundary between a cell and its environment?

• Mitochondria

• Cell membrane

• Chloroplast

• Nucleus

How does a eukaryotic organism differ from a prokaryotic organism?

• A prokaryote is not made of cells

• A prokaryote does not contain genetic information

• The cells of a prokaryote do not contain chlorophyll

• The cells of a prokaryote do not have a nuclear membrane

Which of these statements is a principle of the cell theory that supports the idea that new cells will replace damaged cells in a scraped knee?

• All living things are composed of cells.

• Cells are the basic units of life.

• All cells are made from existing cells.

• Most cells are too small to be seen without a microscope.

Which kind of molecule provides the building block for muscle tissues, transports other molecules and helps regulate certain reactions in the human body?

• Lipid

• Fat

• Carbohydrate

• Protein

Which compounds join to form proteins?

• nucleic acids

• Amino acids

• Simple sugars

• Fatty acids

Which of these compounds is an organic biomolecule?

• Water (H₂O)

• Carbon dioxide (CO₂)

• Glucose (C₆H₁₂O₆)

• Oxygen (O₂)