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smallest unit that has all of the characteristics of life -ANSWERS-cell
nutrient molecules are used to build cellular structures or for energy. this best
represents which characteristic of life? -ANSWERS-living things acquire materials and
energy from the environment
organs are composed of tissues, which are composed of cells. this is an example of
which characteristic of life? -ANSWERS-living things have levels of hierarchical
organization
technology is the -ANSWERS-application of scientific knowledge for a practical purpose
if a new anti-cancer drug is found to be effective in initial tests with mice, what might
researchers conclude? -ANSWERS-the drug is effective in the mouse model; it must
still be tested in humans
You have discovered a previously unknown organism. It is multicellular, with a
filamentous form, and absorbs food from its environment. Upon microscopic
examination, you see that the cells have nuclei. How would you classify this organism? -
ANSWERS-kingdom fungi
which domains contain organisms that lack a membrane-bound nucleus -ANSWERS-
archaea and bacteria
corn belongs to the kingdom -ANSWERS-plantae
,what is the correct formal for the binomial name of human beings? -ANSWERS-Homo
sapiens
A physician specializes in surgery involving the following group of organs: mouth,
esophagus, stomach, and intestines. Overall, what is the highest level of organization
that this physician is specialized in? -ANSWERS-organ system
which sequence correctly lists the different levels of biological organization, from the
smallest and simplest to the largest and most complex? -ANSWERS-cell-tissues-organ-
organ systems-organisms
when comparing energy and chemicals in an ecosystem, -ANSWERS-chemicals cycle
over and over again but energy flows through once
all the organisms of carious species living within a given area constitute a(n) -
ANSWERS-community
the most important factor that determines where major ecosystems are located on the
globe is -ANSWERS-climate
the term biodiversity refers to -ANSWERS-the total number of species, variation of
species, and the ecosystem in which they live
ever since the antibiotic drug penicillin was discovered in 1928, the incidence of
resistant bacteria has steadily increased as a direct result of -ANSWERS-natural
selection
as the human population size increases -ANSWERS-biodiversity is adversely affected
as humans have destructive effects on ecosystems
,all the banded sunfish in a pond would comprise a(n) -ANSWERS-population
two molecules of glucose combine to form a disaccharide molecule during a(n) _______
reaction -ANSWERS-dehydration
the backbone of a nucleic acid strand is composed of -ANSWERS-alternating pentose
sugars and phosphate groups
In the search to discover the agents that cause mad cow disease, scrapie in sheep, and
CJD and kuru in humans, diseased brain tissues were passed through a fine filter to
remove bacteria. The filtrate was still infectious, indicating that something smaller than
bacteria, either viruses or organic molecule, must be the causative agent. If a virus was
responsible for these brain diseases, then the infectious agent would contain either
RNA or DNA. Other possibilities were that the agent was a carbohydrate, fat, or protein.
Tissue filtrates were treated with agents that destroyed just one of these chemicals and
then injected into a healthy animal, with the results as follows. What is the infectious
agent?
•Amylase digests carbohydrates; tissue filtrate still infects healthy test animal.
•Lipase digests fats; tissue filtrate still infects healthy test animal.
•Formaldehyde and/or heat denatures DNA and RNA; tissue filtr -ANSWERS-protein
which is not a correct attribute of a metabolic pathway? -ANSWERS-a constant supply
of new enzymes must be produces to keep the metabolic pathway active
the location in which the enzyme and substrate complexes is called the -ANSWERS-
active site
where within the cell is ATP built up? -ANSWERS-mitochondria
how efficient is the breakdown of one glucose via cellular respiration? -ANSWERS-39%
, why does FADH2 result in fewer ATP than NADH + H+ -ANSWERS-FADH2 drops its
electrons off lower on the electron transport chain
why is cellular respiration organized into four phases? -ANSWERS-so that the energy
within the glucose molecule can be released in a stepwise fashion
how many NADH + H+ are produced by the citric acid cycle per turn? -ANSWERS-three
the final products of glycolysis are -ANSWERS-2 pyruvate, 2 ATP, and 2 NADH + H+
an acetyl group contains how many carbons? -ANSWERS-two
the raw materials or reactants of the photosynthesis process include -ANSWERS-
carbon dioxide and water
the calvin cycle reactions are dependent upon a supply of -ANSWERS-carbon dioxide,
NADPH, and ATP
Photosynthesis shows higher activity for violet/blue and orange/red and a lower
absorption for green/yellow. If we could create a different photosynthetic pigment that
absorbed absolutely all visible wavelengths of light, the leaves would appear which
color? -ANSWERS-black
how many total carbons are involved in carbon dioxide fixation with 3 molecules of
carbon dioxide and 3 molecules of RuBP? -ANSWERS-18
the substance that initially traps solar energy in photosynthesis is -ANSWERS-
chlorophyll
which cofactor is involved in the Calvin cycle reactions? -ANSWERS-NADP+