CELL BIOLOGY

The term Cell was coined by

• JE Purkinje

• Robert Brown

• Robert Hooke

• AV Leeuwenhoek

The main site for synthesis of lipids

• Lysosomes

• Golgi apparatus

• RER

• SER

When viewing a cork through his homemade microscope, Robert Hook discovered

• small compartments that he called membrane

• small compartments that he called nucleus

The spherical object within a cell that controls its activity is the

• mitochondria

• ribosome

• nucleus

• none of the above

Tags

NGSS.MS-LS1-2

The part of the cell that contains the living substance of the cell, excluding the nucleus, is the

• cytoplasm

• nucleus

Tags

NGSS.MS-LS1-2

Some of these cells have structures like flagella and microvilla. All prokaryotes are single-celled organisms. Compare prokaryotes and eukaryotes. Select the characteristics that only apply to prokaryotes.

• These cells have cell walls made of cellulose

• These cells have DNA in a region called the nucleoid

Plants have a large

• golgi body

• cell membrane

• cell wall

• vacuole

Which is true of prokaryotic and eukaryotic cells?

• Prokaryotic cells lack membrane-bound organelles, and eukaryotic cells contain membrane-bound organelles.

• Prokaryotic cells are larger than eukaryotic cells.

• Eukaryotic cells are simpler than prokaryotic cells.

In cell biology, the nucleus is a membrane-enclosed organelle found in eukaryotic cells. Eukaryotes usually have a single nucleus, but a few cell types, such as mammalian red blood cells, have no nuclei, and a few others have many. Which is the role of nucleus in eukaryotes?

• Structure that organizes motion of chromosomes.

• Structure that contains DNA and directs the cell

The levels of organization from the simplest to the most complex are

• Cells, organs, organ systems, tissues, organism

• Tissues, cells, organs, organism.

Tags

NGSS.HS-LS1-2