BIO 256 FINAL EXAM everything covered 2024/2025 (896 questions and complete solutions Graded A+)
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Course
Cell Biology
Institution
Cell Biology
BIO 256 FINAL EXAM everything covered 2024/2025 (896 questions and complete solutions Graded A+)
BIO 256 FINAL EXAM everything covered 2024/2025 (896 questions and complete solutions Graded A+)
BIO 256 FINAL EXAM everything covered 2024/2025 (896 questions and complete solutions Graded A+)
BIO 2...
BIO 256 FINAL EXAM everything
covered 2024/2025 (896 questions and
complete solutions Graded A+)
BIO 256 FINAL EXAM everything
covered 2024/2025 (896 questions and
complete solutions Graded A+)
Fatty acids used for energy are first broken into - ANSWER- Mitosis makes diploid
daughter cells, and meiosis makes haploid daughter cells.
What is the major cause underlying the rapid aging disease, Progeria? - ANSWER- A
single nucleotide change in the LMNA gene sequence leads to an error in mRNA
splicing and a defective nuclear protein.
both redox reactions and energy coupling through the hydrolysis of ATP can drive
unfavorable reactions forward. - ANSWER- Some metabolic reactions that may not be
independently energetically favorable in the human body may still proceed to a final
product because:
When the body is under stress, including during heavy exercise, blood must continue to
flow to vital organs. The two most vital organs are the - ANSWER- Brain and heart
When cells move substances into vesicles in the cytoplasm, it is called - ANSWER-
endocytosis
The"lock-and-key model" of enzyme function describes the - ANSWER- specific fit of a
substrate to its particular enzyme.
What could you observe in a cell making a lot of one certain protein, if you used an
electronmicroscope? - ANSWER- polyribosomes in the cytoplasm
Transfer RNAanticodons pair complementarily to the ______ of mRNA. - ANSWER-
codons
The RNA typed haracterized by folding on itself to form a twisted cloverleaf structure
withan attached amino acid is called - ANSWER- tRNA
Which consists of a single strand of nucleotides? - ANSWER- RNA
Which is NOT a function of proteins? - ANSWER- provides genetic code
,BIO 256 FINAL EXAM everything
covered 2024/2025 (896 questions and
complete solutions Graded A+)
Secondary structure - ANSWER- The coiling of the protein chain backbone into an
alpha helix is referred to as the:
In the structure of a protein or its subunits, the symbol N stands for nitrogen and the
symbol R stands for - ANSWER- residue or rest of the molecule, any functional group of
an amino acid.
The molecule central to all metabolism is - ANSWER- glucose
A solution resisting changes in H+ concentration and tending to maintain a stable pH is
called a ____ solution. - ANSWER- buffer
Cations have a ____charge and are formed when they have ____ an electron to/from
an anion. - ANSWER- positive, donated
Water absorbs and releases large amounts of heat before changing temperature. This
is important in - ANSWER- maintenance of body temperature
Which organ would get the least blood flow during the running of a marathon? -
ANSWER- small intestine
extracellular - ANSWER- Any water not contained within the cells is said to be part of
the body's _____ compartment.
In a negative feedback loop used to maintain homeostasis, which of the following terms
is NOT likely to be used? - ANSWER- hypothesis
Which would be anormal measure of potassium in venous blood? - ANSWER- 16 meq/L
Which of the following statements is true concerning feedback mechanisms? -
ANSWER- Negative feedback mechanisms work to prevent sudden severe changes
within the body.
Your physiological status would be greatly improved if you were to remove all
cholesterol from your body. - ANSWER- False
Which cofactor is associated with the conversion of double carbon-carbon bonds to
single bonds? - ANSWER- FAD
Movement of water through a cell membrane, rather than solute, is called - ANSWER-
osmosis
,BIO 256 FINAL EXAM everything
covered 2024/2025 (896 questions and
complete solutions Graded A+)
The favored fuel of the brain is - ANSWER- glucose
An atom or molecule has been oxidized when - ANSWER- it has lost some of its
electrons
Which is NOT a function of membranes? - ANSWER- storage of glycogen
Polyribosomes are seen in cells - ANSWER- making a lot of one certain protein.
Anticodons would befound in - ANSWER- tRNA
RNA is made by ____;protein is made by ____. - ANSWER- transcription, translation
Which contains your genetic inheritance from your parents - ANSWER- DNA
Which of the following proteins is composed of four polypeptides and has quaternary
structure? - ANSWER- Hemoglobin
There are 20 amino acids in proteins and they differ by their - ANSWER- side chain (-R)
Buffers keep ___ constant in our bodies - ANSWER- pH
Which release OH- in water? - ANSWER- bases
Water is anespecially good solvent for biological molecules because it is - ANSWER-
polar
Which is a major element of the human body - ANSWER- oxygen
Which is NOT an individual's survival need? - ANSWER- reproduction
In positive feedback... - ANSWER- the response of the system amplifies the input
response
Which body fluid compartment drains fluid from between cells, returning it to the blood?
- ANSWER- lymph
When stress limits resources for organs, which organ receives top priority for receiving
blood? - ANSWER- brain
Which is a trace element of the human body? - ANSWER- copper
, BIO 256 FINAL EXAM everything
covered 2024/2025 (896 questions and
complete solutions Graded A+)
Which is an inorganic molecule? - ANSWER- NaCl
Which would form an electrolytic solution when dissolved in water? - ANSWER- sodium
chloride
Table sugar, sucrose, is composed of - ANSWER- glucose and fructose
What is NOT a reason why you and your cells age? - ANSWER- genes shorten until
they no longer function
"universal energy carrier" - ANSWER- ATP
NAD is - ANSWER- a coenzyme
Enzyme allosteric sites can be important to the overall outcome of a metabolic pathway
because - ANSWER- they can serve as a regulator of the active site, leading to the
possibility of negative or positive feedback in a pathway
to obtain metabolic energy from glycogen, you must first - ANSWER- break the
molecule into glucose units
Each Acetyl CoA molecule that enters the Krebs cycle produces? - ANSWER- 3 NADH
2 CO2
1 H+
1 ATP
1 FADH2
When glucose is catabolized under _____ conditions, pyuvates will lose a carbon. Then
the acetate made will cross the mitochondrial wall and enter the Krebs cycle. -
ANSWER- aerobic
To obtain metabolic energy from glycogen, you must first - ANSWER- break the
molecule into glucose units
Which organs can obtain metabolic energy from lactic acid? - ANSWER- heart and liver
Ion channels in a cell membrane permit the selective passage of - ANSWER- Na+ and
K+
When a gated channel opens in response to a stimulus, allowing sodium ions to flow
with their concentration gradient into a cell, this is an example of - ANSWER- faciliated
diffusion
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