BIL 150 Final || QUESTIONS WITH 100% VERIFIED ANSWERS.
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Course
BIL 150
Institution
BIL 150
Protein molecules are polymers of... correct answers amino acid molecules
In a dehydration synthesis reaction, ... is always formed as a by-product of the reaction. correct answers water
Which is the terms for compounds that do not mix with water? correct answers Hydrophobic
The components...
BIL 150 Final || QUESTIONS WITH 100% VERIFIED
ANSWERS.
Protein molecules are polymers of... correct answers amino acid molecules
In a dehydration synthesis reaction, ... is always formed as a by-product of the reaction.
correct answers water
Which is the terms for compounds that do not mix with water? correct answers Hydrophobic
The components of nucleic acids are... correct answers a nitrogenous base, a pentose sugar,
and a phosphate
At a conference, the speaker's grand finale was sautéing mealworms (insect larvae) in butter
and serving them to the audience. They were crunchy (like popcorn hulls) because their
exoskeletons contain the polysaccharide __________. correct answers chitin
When comparing saturated and naturally occurring unsaturated fats, the unsaturated fats have
__________ and are __________ at room temperature. correct answers cis double bonds;
liquids
Nitrogenous bases are classified as either purines or pyrimidines. Examples of purines are
__________. correct answers adenine and guanine
Sugars have a(n) __________ group that interacts with a _________ group that forms ring
structures when the dry molecule is placed in water. correct answers carbonyl, hydroxyl
Sugars are molecules that have __________ C:H:O and are called __________. correct
answers a 1:2:1 ratio of; carbohydrates
The peptide bond is __________. correct answers a covalent bond joining amino acids
together to form a polypeptide
A shortage of phosphorus in the soil would make it especially difficult for a plant to
manufacture __________. correct answers DNA
Macromolecules, the molecules of life, include all of the following except __________.
correct answers trace elements
The type of bond that forms to join monomers (such as sugars and amino acids) into
polymers (such as starch and proteins) is a(n) __________ bond. correct answers covalent
The secondary structure of a peptide backbone is stabilized by __________ forming either
a(n) __________ or a(n) __________. correct answers hydrogen bonds; α helix; β pleated
sheet
The tertiary structure of a protein includes all of the following interactions except _________
bonds. correct answers peptide
,Generally, animals cannot digest (hydrolyze) the glycosidic linkages between the glucose
molecules in cellulose. How then do cows get enough nutrients from eating grass? correct
answers Microorganisms in their digestive tracts hydrolyze the cellulose to individual glucose
units.
The subunits (monomers) in cellulose are linked together by __________. correct answers
glycosidic linkages
The lipids that form the main structural component of cell membranes are __________.
correct answers phospholipids
... have a specific form that allows them to bind to foreign materials in the body. correct
answers Antibodies
... are proteins that act as biological catalysts. correct answers enzymes
... usually function as structural proteins. correct answers fibrous proteins
...bind signaling molecules such as endorphins that may change the behavior of a cell. correct
answers receptor proteins
Which type of protein shields a newly forming protein from cytoplasmic influences while it is
folding into its functional form? correct answers Chaperonins
The molecule with four fused rings that is found in animal membranes and is the precursor of
vertebrate sex hormones is __________. correct answers cholesterol
Which of the following is a polymer? correct answers Cellulose, a plant cell wall component
The sequence of amino acids in a protein is called the __________ structure of the protein.
correct answers primary
A polysaccharide that is used for storing energy in human muscle and liver cells is
__________. correct answers glycogen
Carbohydrates are used in our bodies mainly for __________. correct answers energy storage
and release
The proper three-dimensional shape and folding of a protein is assisted by _________.
correct answers molecules called chaperonins
Sickle-cell anemia is a disease that is caused by __________ in the __________ of the
protein. correct answers a single amino acid change; primary structure
The sex hormones estrogen, progesterone, and testosterone belong to which class of
molecules? correct answers Lipids
Which of the following groups is primarily involved in synthesizing molecules needed by the
cell? correct answers Ribosomes, rough endoplasmic reticulum, and smooth endoplasmic
reticulum
,Cilia and flagella move due to the interaction of the cytoskeleton with which of the
following? correct answers motor proteins
The network of fibers that organizes structures and activities in a cell __________. correct
answers is the cytoskeleton
The function of the rough endoplasmic reticulum (RER) is __________ correct answers to
synthesize proteins that are secreted as glycoproteins
Cell junctions in plant cells are called __________, and communicating junctions in animal
cells are called __________. correct answers plasmodesmata; gap junctions
Cells are small because __________. correct answers of the geometric relationships between
surface and volume
A localized group of organisms that belong to the same species is called a correct answers
population
All the organisms on your campus make up correct answers a commmunity
Which of the following is a correct sequence of levels in life's hierarchy, proceeding
downward from an individual animal? correct answers nervous system, brain, nervous tissue,
nerve cell
Which of the following is not an observation or inference on which Darwin's theory of
natural selection is based? correct answers Poorly adapted individuals never produce
offspring.
Systems biology is mainly an attempt to correct answers understand the behavior of entire
biological systems.
Protists and bacteria are grouped into different domains because correct answers protists have
a membrane-bounded nucleus, which bacterial cells lack
Which of the following best demonstrates the unity among all organisms? correct answers the
structure and function of DNA
A controlled experiment is one that correct answers tests experimental and control groups in
parallel.
Which of the following statements best distinguishes hypotheses from theories in science?
correct answers Hypotheses usually are relatively narrow in scope; theories have broad
explanatory power
Which of the following is an example of qualitative data? correct answers The fish swam in a
zigzag motion.
Which of the following best describes the logic of scientific inquiry? correct answers If my
hypothesis is correct, I can expect certain test results.
, When the body's blood glucose level rises, the pancreas secretes insulin and, as a result, the
blood glucose level declines. When the
blood glucose level is low, the pancreas secretes glucagon and, as a result, the blood glucose
level rises. Such regulation of the blood
glucose level is the result of correct answers Negative feedback
Which of the following is (are) true of natural selection? correct answers It requires genetic
variation, results in descent with modification, and involves differential reproductive success.
Why is it important that an experiment include a control group? correct answers Without a
control group, there is no basis for knowing if a particular result is due to the variable being
tested.
What factors are most important in determining which elements are most common in living
matter? correct answers both the relative abundances of the elements and the emergent
properties of the compounds made from these elements
The organic molecules in living organisms have a measurably lower ratio of
carbon-13/carbon-12, two stable isotopes of carbon
that comprise approximately 1.1% and 98.9% of atmospheric carbon, respectively. What is a
reasonable explanation for this
phenomenon? correct answers Photosynthesis preferentially uses carbon dioxide molecules
with carbon-12, and the lower carbon-13/carbon-12 ratio propagates through the food chain.
The illustration shows a representation of formic acid. A formic acid molecule correct
answers will form hydrogen bonds with water molecules.
The reactivity of an atom arises from correct answers the existence of unpaired electrons in
the valence shell
The partial negative charge in a molecule of water occurs because correct answers the
electrons shared between the oxygen and hydrogen atoms spend more time around the
oxygen atom nucleus than around the hydrogen atom nucleus.
The nutritional information on a cereal box shows that one serving of a dry cereal has 200
kilocalories. If one were to burn one
serving of the cereal, the amount of heat given off would be sufficient to raise the
temperature of 20 kg of water how many degrees
Celsius? correct answers 10.0°C
If the pH of a solution is decreased from 9 to 8, it means that the correct answers
concentration of H⁺ has increased tenfold (10X) and the concentration of OH⁻ has decreased
to one-tenth (1/10) what they were at pH 9.
One of the buffers that contribute to pH stability in human blood is carbonic acid (H2CO3).
Carbonic acid is a weak acid that
dissociates into a bicarbonate ion (HCO3-) and a hydrogen ion (H+) -- H2CO3 ↔ HCO3- +
H+
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