NMU BI-112 Exam 1 Questions and Answers Already Passed
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Course
NMU BI-112
Institution
NMU BI-112
NMU BI-112 Exam 1 Questions and
Answers Already Passed
What defines a living organism at the cellular level?
A living organism is defined by the presence of one or more cells that exhibit characteristics
of life, such as metabolism, growth, and response to stimuli.
How do monosaccharides...
NMU BI-112 Exam 1 Questions and
Answers Already Passed
What defines a living organism at the cellular level?
✔✔A living organism is defined by the presence of one or more cells that exhibit characteristics
of life, such as metabolism, growth, and response to stimuli.
How do monosaccharides contribute to larger carbohydrate structures?
✔✔Monosaccharides serve as the building blocks for larger carbohydrates like disaccharides and
polysaccharides through glycosidic bonds.
What structural roles do proteins play in cells beyond enzymatic functions?
✔✔Proteins provide structural support, serve as channels and transporters, and help maintain cell
shape and integrity.
What types of lipids are involved in cell membrane structure?
✔✔Phospholipids are essential for forming cell membranes, while cholesterol helps to stabilize
membrane fluidity.
1
,In what ways can a hypothesis be tested in scientific research?
✔✔A hypothesis can be tested through experiments, observations, and collecting data to support
or refute the prediction.
What does a pH of 7 indicate about a solution?
✔✔A pH of 7 indicates that a solution is neutral, meaning it has equal concentrations of
hydrogen ions and hydroxide ions.
What is the difference between free ribosomes and bound ribosomes?
✔✔Free ribosomes synthesize proteins that function within the cytosol, while bound ribosomes
produce proteins that are secreted or integrated into membranes.
How does the fluid mosaic model describe the structure of the plasma membrane?
✔✔The fluid mosaic model describes the plasma membrane as a dynamic structure with a
flexible lipid bilayer containing embedded proteins that move freely within it.
What factors can influence enzyme activity?
✔✔Enzyme activity can be influenced by temperature, pH, substrate concentration, and the
presence of inhibitors or activators.
2
, What is the structure of DNA and how does it facilitate replication?
✔✔DNA has a double helix structure, which allows it to unwind and separate into two strands
during replication, providing templates for new complementary strands.
How do cell cycle checkpoints ensure proper cell division?
✔✔Cell cycle checkpoints monitor the integrity of DNA and the completion of key processes,
preventing the division of damaged or unprepared cells.
In what ways do osmosis and diffusion contribute to homeostasis in cells?
✔✔Osmosis and diffusion regulate the movement of water and solutes, helping to maintain
balance within cells and their environments.
What role does the scientific method play in hypothesis formulation?
✔✔The scientific method guides the formulation of hypotheses based on observations, leading to
systematic testing and analysis of results.
How do water's unique properties support life in ecosystems?
3
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