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Biology Fall Finals Review 6 Flashcards | StudBud
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Biology Fall Finals Review 6
Biology Fall Finals Review 6
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1
In what decade did the cell theory become an accepted part of biology?
1850's
1940's
1620's
2
Which does a polymer most closely resemble?
chain link
circle
chain
3
Which equation satisfies the law of conservation of matter?
4O2 + 3Al → 4AlO3
3O2 + 2Al → 2AlO3
3O2 + Al → 3AlO3
4
In humans and multicelluar organisms, which substance plays a central role as an energy source?
fat
protein
carbohydrate
5
Which is NOT true of lipids?
They are hydrophobic
They are commonlycalled fats and oils.
They are good forenergy storage.
6
A single carbon atom can form a maximum of how many single covalent bonds?
2
4
6
8
7
Which most likely approximate the motion phospholipids make in a plasma membrane?
b
d
a
c
8
You suspect that a chemical that you are testing in the lab is strongly acidic. What is its pH?
7
11
2
9
How does an enzyme influence a biological reaction?
It decreases activation NRG needed to start chemical change.
increases net NRG between products and reactants
increases the net energy of reactants
10
What makes a water molecule polar?
A water molecule hasa slight charge on each end.
The pH of pure watervaries with the temperature
Water has the abilityto be frozen.
11
What would biochemists call the result of chaining many of these molecules together?
carbohydrate
a protein
lipid
12
A plant cell is placed in a hypotonic solution. What will happen to the plant cell?
it will swell
will shrink
do nothing
13
Which statement is a fundamental principle of the cell theory?
Living organisms arecomposed of cells.
Eukaryotic cells arelarger than prokaryotic cells.
All cells have aplasma membrane.
14
What did scientists observe using the earliest microscopes.
molecules
cell parts
atoms
15
Scientist that revolutionized biologists thinking about the
evolutionary history
of eukaryotes?
Margulis
Everett
Pasteur
16
A charged atom that has lost or gained electrons is called a(n) ___________
ion
catalyst
acid
17
Which manufactures ribosomes?
Endoplasmic Reticulum
Nucleus
Nucleolus
18
An atom of fluorine has nine electrons. Its second energy level has ____.
two electrons
eight electrons
seven electrons
19
Which is the best description of activation energy?
heat released as thereaction proceeds
heat stored within the reactant molecules
heat added toinitiate a reaction
20
When added to water,how does an acid affect the pH and H
+
concentration?
The pH decreaseswhile the H+ increases.
Both pH and H+ decrease.
Both pH and H+ increase.
21
Which is the best example of a solution?
blood
paint
milk
22
In the following equation, what are the products of the reaction?
6CO2 and 6H2O
C6H12O6 and 6O2
6O2 and 6CO2
23
to determine if cells under a microscope are plant or animal. What might you look for?
a nucleus andribosomes
chloroplasts and acell wall
ribosomes andvacuoles
24
The substance labeled
catalyst
is
also known by what other name?
antibody
ion
enzyme
25
Which scientist first used the term
cell?
Pasteur
Hooke
Jansen
26
Which cell organelle contains coded directions for production of proteins?
Golgi apparatus
Endoplasmic reticulum
Lysosome
27
Which cannot take place during a chemical reaction?
bonds breaking between atoms
formation of new molecules
formation of new atoms
28
Which macromolecule is involved in nearly every function in the human body?
nucleotide
fats
carbohydrate
29
What is a major difference between facilitated diffusion and active transport?
A.T. uses proteins
A.T. moves substances against the concentration gradient.
A.T. moves susbstances with the concentration gradient
30
Which element would need to be removed from the molecule in Figure 6-2 to make it unsaturated?
carbon
oxygen
hydrogen
