Cell structure

Question 1

Carry out all chemical activities needed to
sustain life

Answer 1

Cells

Question 2

are groups of cells that are similar
in structure and function organs
organ systems organism

Answer 2

Tissues

Question 2

Cells are organized into three main regions

Answer 2

Nucleus
Cytoplasm
Plasma membrane

Question 2

Barrier of the nucleus

-Consists of a selectively permeable,
double phospholipid membrane

Answer 2

Nuclear Membrane

Question 3

Sites of ribosome production and partial assembly

Answer 3

Nucleoli

Question 3

Control center of the cell

Answer 3

The Nucleus

Question 3

Composed of unwound DNA and
protein – used for making proteins

Scattered throughout the nucleus

Chromatin condenses to form
chromosomes when the cell divides

Answer 3

Chromatin

Question 4

– receptors, cell recognition and
communication, channels for transport

Answer 4

Protein

Question 4

keep membrane fluid and stable

Answer 4

Cholesterol

Question 5

receptors, cell-to-cell interactions

Answer 5

Glycoproteins

Question 6

Finger-like projections that
increase surface area for absorption

Answer 6

Microvilli

Question 7

impermeable, leakproof
sheets

Answer 7

Tight junctions

Question 8

anchorings that prevent cells from being separated

Answer 8

Desmosomes

Question 9

allow communication between
cells through connexons that
span the two cell membranes

Answer 9

Gap junctions

Question 10

Material outside the nucleus and inside
the plasma membrane

Answer 10

Cytoplasm