Unit 2: Section 1: BIO

1 meter = ____ centimeters

100

you have identified a new organism. It has ribosomes, plasmodesmata, and cell walls made of cellulose. This new organism is most likely____

A plant cell

which of the following statements about cells is true?

All cells have internal structures that move

what name is given to the rigid structure, found outside the plasma membrane, that surrounds and supports the bacterial cell?

Cell wall

Surface appendages that allow a bacterium to stick to a surface

Fimbriae

which of the following organelles is found only in animal cells and not in most plant cells?

Lysosome

in plants,______are the cell junctions that allow the free exchange of small molecules that assist in communication, in animal cells, similar cell junctions are known as...

Plant: Plasmodesmata Animal: Gap Junctions

the bacterial structure that acts as a selective barrier, allowing nutrients to enter the cell and wastes to leave the cell.

Plasma Membrane

the structure that regulates the passafe of material into and out of this bacterial cell.

Plasma membrane

Cell theory states

all living things come from cells and that all cells come from other cells

which of the following is NOT an example of an organelle found within an animal cell?

cell wall

What changes would you expect to see in the liver cells of someone suffering from chronic alcoholism?

increased levels of endoplasmic reticulum activity

Protein synthesis requires the use of mRNA, which?

is translated by the ribosomes into the amino acid sequences of proteins.

Mitochondria appear in the greatest numbers in cells that are _____.

metabollicaly active

the DNA containing region of the bacterial cell

nucleoid region

Where is bacterial cells DNA found?

nucleoid region -Bacteria lack a nucleus; their DNA is found in the nucleoid region.

Digestive cells produce and secrete many enzymes that break down ingested food. These cells have a large number of ribosomes __________.

on the rough ER

which location in the cell is unlikely to contain ribosomes or ribosomal subunits?

plasma membrane

____cells lack a membrane enclosed nucleus

prokaryotic

what is the function of bacteriums capsule?

protection

Of the following organelles, which group is involved in manufacturing the substances needed by the cell?

ribosome, Rough ER, and smooth ER

In a bacterium, where are proteins synthesized?

ribosomes -Ribosomes are involved in the manufacture of polypeptides (proteins).

You would expect a cell with an extensive Golgi apparatus to __________.

secrete a lot of material

which of the following statements reguarding the endomembrane system is false?

the endomembrane system is a system of interrelated membranes that are physically connected.

As cell size increases, the volume?

volume increases proportionally more than the surface area

which of the following clues would tell you whether a cell is prokaryotic or eukaryotic?

whether or not the cell is partioned into compatments by internal membranes