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Life Sciene 1 Test Two
N/A
33
Science
Undergraduate 1
03/07/2011

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Term
Definition of Cancer
Definition

 

Cancer is a disease of the cell cycle in which cellular reproduction occurs repeatedly uncontrollably without end, because the regulation of the cycle is lost.

 

Term
Contact Inhibition
Definition
 when normal cells prevent their neighbors from dividing by touching them.
Term
Four Basic Stages of Cancer
Definition

Cells with mutation

 

A - Cancer Cells Mircrospic

B - Cancer is large enough to be felt as a lump

C - cancer has spread from the orginal site into surrounding areas

D - Cancer has spread to the other tissue parts of the body

Term
ATP releases energy when ________
Definition
a phosphate is removed
Term
Which of the following shows the flow of energy at the cellular level through the biosphere?
Definition
solar energy - chloroplast - mitochondria
Term
The part of the enzyme into which the substrate fits is called the ________.
Definition
active site
Term
What process typically regulates the enzymes involved in metabolic reactions?
Definition
feedback inhibition
Term
Molecules move from greater to lesser concentration through a transport protein in ________.
Definition
facilitated diffusion
Term
What prevents a plant cell from bursting in a hypotonic solution?
Definition
cell wall
Term

The figure below reflects how these two cells would respond in a _______ environment.

[image]

[image][image]

Definition
hypertonic
Term
Intestinal cells absorb glucose via active transport. What would happen if all the mitochondria within these intestinal cells were destroyed
Definition
Glucose absorption would decrease.
Term
Which of these words does not belong with the rest as it relates to concentration gradient?
Definition
active transport
Term
Pickles are often preserved in a 20-30% salt solution called brine. How does this method prevent contamination by microorganisms?
Definition
Bacteria can't survive in a hypertonic solution because they lose water.
Term
Inside the chloroplasts, chlorophyll is found in the
Definition
thylakoid membrane.
Term
The light-harvesting complexes of a chloroplast are located in the ______; the enzymes of the Calvin cycle reactions are located in the _________.
Definition
thylakoid membrane; stroma
Term
The _______ from the light reactions is used to reduce CO2 to a carbohydrate using energy derived from ______.
Definition
NADPH; ATP
Term
Which of the following is not derived from G3P
Definition
NADP+
Term
How many turns of the Calvin cycle would be required for a plant to make one molecule of glucose?
Definition
6
Term
What two things are added to NADP+ to convert it into NADPH?
Definition
H+ and electrons
Term
Which complex or enzyme of photosynthesis consumes H2O?
Definition
Photosystem II
Term

Which of the labeled cells of a C3 leaf does not perform photosynthesis?

[image]

Definition
A and D
Term

In which of the labeled cells of a C4 leaf are the Calvin cycle reactions performed?

[image]

Definition
C only
Term
Energy to drive the formation of ATP in photosynthesis is derived from ____________.
Definition
H+ gradient
Term
What molecule most directly provides the energy you need for your muscles to contract?
Definition
ATP
Term
What organelle is used during the process of cellular respiration
Definition
mitochondria
Term
On the cellular level what process uses oxygen to break food down, producing ATP?
Definition
cellular respiration
Term
Yeast is used to make bread rise by producing ___ during fermentation
Definition
CO2 gas
Term

Where do the protons and electrons come from that are used in the electron transport chain?

Definition
NADH and FADH2
Term
You have decided to try to make your own wine by adding yeast to a sweet grape juice. After allowing plenty of time for the yeast to grow, you find that although the sugar levels in the juice are decreased, there is not alcohol in the mixture. What could have been they reason fermentation did not occur?
Definition
The mixture needs less oxygen, yeast only produce alcohol in the absence of oxygen.
Term
The functioning of an electron transport chain is analogous to ________.
Definition
a person climbing a flight of stairs one step at a time
Term
The structure labeled "c" in the following figure is called the ________.[image]
Definition
centromere
Term
All of the following statements are true about mitosis except
Definition
he cells arising from the process all have half of the genetic material.
Term
The figure below shows a cell in the mitotic stage of ________.
Definition
metaphase
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