Comprehensive Biology Review
Homeostasis is the process by which organisms...
Maintain internal stability in a constantly changing environment.
A variety of bird species on the Hawaiian Islands have acquired different types of beaks needed
for utilizing specific food resources. What is the likely process by which these different species
of finches came about?
vertical inheritance with mutation.
A researcher tests the hypothesis that people who take large daily doses of vitamin C are less
likely to catch common colds. What would be the best experimental and control group to test
this hypothesis?
Experimental group: people take a large daily dose of vitamin C; Control group: people take a
daily dose of a sugar pill disguised as vitamin C.
Isaac Newton proposed that every particle attracts every other particle in the universe with a
force, which is mathematically expressed as (F = Gm1m2/r2). This statement is an example of
a...
law
Which of the following is the simplest unit that shows all the characteristics of life?
a cell
Neanderthals were humans who lived in Europe and Asia 40,000 years ago (estimate). Today
these ancient humans are believed to be in the same species as anatomically modern humans
(Homo sapiens). Homo sapiens and Neanderthals living together in the same habitat would be
described as...
a population
In the periodic table, the value that refers to the sum of protons and neutrons is...
atomic mass
Select the answer choice that describes the number of protons, electrons, and neutrons for a
neutral (uncharged) isotope of platinum, Pt-195 shown below
,78 protons, 78 electrons, 117 neutrons
An atom has 2 protons. How many electrons are held in the 2nd shell? Enter your answer as a
whole number (e.g., 14 or 99).
0
An atom has 2 protons. How many unpaired valence electrons does it have? Enter your answer
as a whole number (e.g., 14 or 99).
0
What kind of chemical bonding is depicted by the solid lines connecting O and H in the figure
below?
covalent bonding
Carbon and hydrogen have similar electronegativities. Carbon and hydrogen can form bonds to
make hydrocarbon molecules. What type of bonds form between these atoms?
nonpolar covalent
Amphipathic molecules...
possess both hydrophilic and hydrophobic properties.
If lemon juice has a pH of 3, then it can be described as...
having a H+ concentration of 10-3M
Below are the structures of two molecules with identical molecular formulas. Which of the
following options best describes what these are?
-Enantiomers
Below are the chemical formulas and structures of two molecules, C6H12O6 (glucose) and
C6H12O6 (ribose). Which of the following options best describes what these are?
two different compounds
Covalent bonds between sulfhydryl groups in one polypeptide chain contributed to the _____
structure of the protein.
Tertiary
What type of structure is depicted in the image?
-Protein alpha helix
, The following is an example of condensation: Monosaccharide 1 + Monosaccharide 2 -->
Disaccharide + H2O
true
Which of the following statements does NOT accurately describe a difference between DNA and
RNA?
-DNA is only found in the nucleus, while RNA is only found in the cytoplasm.
You have two samples of double stranded DNA that are the same length.
Sample 1 is 26% Adenine and Sample 2 is 26% Guanine.
Which one of these samples will remain double stranded longer as the temperature is
increased?
sample 2
The molecular structure shown belongs to which macromolecular family?
nucleic acid
Scientists examined tissues from various types of plants and animals under microscopes. They
found that, in every case, the tissues were composed of repeating microscopic units that looked
like "little rooms" they called cells. What component of cell theory does this evidence support?
All living things are made of cells.
Which statement correctly describes the differences between resolution and contrast?
-Resolution refers to the ability to distinguish fine details, while contrast refers to the difference
in brightness between parts of an image.
You are using a confocal microscope that uses a laser beam with a wavelength of 650 nm to
illuminate samples. Your colleague uses a scanning electron microscope with a wavelength of
0.002 nm to look at the same samples. What advantage does the scanning electron microscope
have over the confocal microscope?
-The SEM allows higher resolution visualization of the sample's surface.
Liveo akenes is a multicellular organism that can carry out photosynthesis.
It has a cell wall, chloroplasts, a nucleus, and other membrane-bound organelles.
What sort of organism is this?
plant