Biology Exam #1

Monomers that make proteins are?

amino acids

Monosacchrides make up what?

Carbs

Fatty acids & gycernol make up?

lipids

Biuret reagent is what color

clear blue

When testing for starch (polysaccharides) the color will turn

blue black

When testing for lipids the color will turn

reddish orange

when testing for a protein with bireut the color will turn

violet

True or False
Plants store access sugar by capturing energy from the sunlight by photosynthesis. Using green pigment in their leaves to called chlorphyll makes sugar

True

An emulsifier keeps water and oils combined and stops them fro a period of time

True

Eukaryotic cells have nuclues

True

Prokaryotic cells have no nucleus

True

Eurkryotic DNA is linear

True

Prokarytotic is circular

True

Eukaryotic DNA is complex with DNA called histones

True

Prokarytic DNA is naked

True

Both Eukaryotic and Prokarytoic cells have riobsomes

True

Amoebas use pseudopods to move around (false feet)

True

Amoebas use pseudopods to move around (false feet)

True

Animal and plant cells both have

nucleus, cytoplasm, ribosomes, mitochondria and gogli asppartus

Animals cells have cillia

True

Animals cells don't have a chlorplast

True

Animal cells have one or more small vacuole

True

Plant cells have one large vacuole

True

Animal cells have a cell wall

True

Animal cells only have a plasma membrane

True

Plant cells have a plasma & membrane

True

Animal cells lysomes occure in cytoplasm

True

What is cytoplsmic streaming?

The movement of cytoplasm in such a way as to distribute cytoplasmic nutrients in different parts of the cell where it is needed

What is solute

a component of a solution

What is solvent

the dissolving substance

What is the solution

a homogeneous mixture formed by a single phase of liquid

What is concentration gradient

A gradual change in the concentration of solutes in a solutions as a function of distance through a solution

What is osmosis?

The net movement of water across a selectively permeable membrane driven by a difference in solute concentrations on two sides of a membrane

What is Tonicity?

The measure of the osmotic pressure gradient of two solutions separated by a semipermeable membrane

What is a hypotonic solution

Refers to any solution which has less solute. The cell will increase it's fluid intake

What is hypertonic solution

Water diffuses out of the cell, and the cytoplasm shrinks and gets more concentrated.

What is an isontic solution

Nothing. There is no difference between concentration's gradient and so no net flow of water from cytosol [liquid part of cytoplasm] to the solution in which cell is immersed occurs