Ch 3 Test 2023-2024

Which invention played the biggest role in the discovery of cells by early scientists?

• magnifying glass
• lens
• eyeglasses
• compound microscope

The cell theory states that all organisms are made of cells; cells are the most basic unit of life; and

• all existing cells form by free-cell formation.
• all cells are eukaryotic.
• all existing cells are produced by other living cells.
• all cells have a nucleus.

Unlike a eukaryotic cell, a prokaryotic cell does not have

• DNA.
• a cell membrane.
• cytoplasm.
• a nucleus.

Specialized structures that work together inside a cell are called ____. Also called "little organs".

• prokaryotes.
• eukaryotes.
• nuclei.
• organelles.

What is the main function of the Golgi apparatus?

• communicate with other cells
• convert solar energy to chemical energy
• process, sorts, and deliver proteins
• copy genetic material

Which of the following organelles can be found in the cytoplasm and on the surface of the endoplasmic reticulum?

• mitochondria
• centrosomes
• ribosomes
• centrioles

Which organelle contains enzymes that break down damaged cell parts?

• centriole
• lysosomes
• vacuole
• mitochondria

What are the main differences between plant and animal cells?

• Animal cells are eukaryotes and plant cells are not.
• Plant cells are eukaryotes and animal cells are not.
• Animal cells have cell walls and chloroplasts; plant cells do not.
• Plant cells have cell walls and chloroplasts; animal cells do not.

Which model did scientists develop to describe the cell membrane?

• phospholipid model
• dynamic model
• fluid mosaic model
• transport model

Which phrase best describes the property of selective permeability?

• some molecules pass
• all ions pass
• large molecules pass
• all molecules pass