Given that a newly discovered unicellular organism from acidic mine drainage possesses a cell wall, a plasma membrane, two flagella, and peroxisomes, what is the most likely classification of the organism?

bio midterm 1

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Biology
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University
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Hard
arika you
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48 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Nonmotile prokaryote
Motile bacterium
Motile archaea
Nonmotile eukaryote
Motile eukaryote
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
A significant decrease in energy production (ATP) in eukaryotic cells would result from the malfunction of which specific organelle?
Lysosome
Mitochondrion
Golgi apparatus
Peroxisome
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Whales can survive cold temperatures partly due to the composition of their membranes. Which of the following characteristics is associated with their membrane structure?
The membranes have a higher proportion of unsaturated phospholipids.
The membranes have a lower proportion of cholesterol molecules.
The membranes have a lower proportion of hydrophobic proteins.
The membranes have a higher proportion of glycolipids.
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Carrot slices that are immersed in fresh water for several hours become firm. Similar slices left in a 0.15 M salt solution become soft. Which statement best explains the tonicity of the surroundings?
Both fresh water and the salt solution are hypertonic to the cells of the carrot slices.
Fresh water is hypotonic, and the salt solution is hypertonic to the cells of the carrot slices.
Fresh water is hypertonic, and the salt solution is hypotonic to the cells of the carrot slices.
Fresh water is isotonic, and the salt solution is hypertonic to the cells of the carrot slices.
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
How do saturated fatty acids influence membrane packing and, consequently, membrane fluidity??
The absence of double bonds allows for a straight structure in the fatty acid tails, promoting tight packing with adjacent lipids.
Saturated fatty acids have a decreased cholesterol content, facilitating close packing with adjacent lipids.
Saturated fatty acids are less polar compared to unsaturated fatty acids.
The absence of double bonds facilitates interaction among the hydrophilic head groups of the lipids.
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
What's a significant difference between prokaryotic and eukaryotic cells?
Prokaryotic cells have cell walls, while eukaryotic cells do not.
Eukaryotic cells have membrane-bound organelles, while prokaryotic cells do not.
Eukaryotic cells have flagella, while prokaryotic cells do not.
Prokaryotic cells are generally larger than eukaryotic cells.
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
What is a defining characteristic of integral membrane proteins among the following options?
They are hydrophilic.
They are hydrophobic.
They are amphipathic, containing at least one hydrophobic region.
They are situated on the interior surface of the membrane.
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