Cellular Structure and Function

Which scientist revolutionized the way biologists think about the evolutionary history of eukaryotes?

• Virchow

• Schleiden

• Margulis

• Pasteur

The scientist that proposed that all cells are produced from the division of existing cells was __________.

• Schwann

• Hooke

• Schleiden

• Virchow

Which organelle produces protein for a cell?

• Golgi apparatus

• nucleus

• endoplasmic reticulum

• ribosome

Tags

NGSS.MS-LS1-2

Which organelle is large in plant cells but small or absent in animal cells?

• Nucleolus

• Vacuole

• Chloroplast

• Centriole

Tags

NGSS.MS-LS1-6

How do carrier proteins facilitate active transport?

• move substances from a high to low concentration

• create an isotonic solution

• block the plasma membrane

• move substances from a low to high concentration

Predict how oxygen crosses the plasma membrane if the concentration of oxygen is lower inside the cell than it is outside the cell.

• Oxygen enters the cell through channel proteins.

• Oxygen leaves the cell through channel proteins.

• Oxygen enters the cell through the plasma membrane.

• Oxygen leaves the cell through the plasma membrane.

Tags

NGSS.MS-LS1-2

Which organelle is called the "powerhouse of the cell"?

• nucleus

• ribosome

• vesicle

• mitochondria

Tags

NGSS.MS-LS1-2

Which organelle is present in a paramecium protozoan but absent in the cells of a strawberry plant?

• microtubules

• cytoskeleton

• cilia

• nucleus

Tags

NGSS.MS-LS4-2

Which of the following statements are principles of the cell theory? Select all that apply.

• Cells are the basic unit of life.

• Cells reproduce by binary fission.

• Cells come from preexisting cells.

• Cells contain membrane-bound organelles.

• All living organisms are composed of cells.

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-1

The bacterium E. coli is a type of cell called a(n) _________.

• Eukaryotic

• Prokaryotic

• nucleus

• cell membrane