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Q 1/10
Score 0
A student is examining a cell under an electron microscope and observes the presence of a plasma membrane, ribosomes, and a circular DNA molecule located in a region called the nucleoid, but no membrane-bound organelles. Into which category should this cell be classified?
30
A eukaryotic cell, because the presence of DNA indicates a complex genetic structure.
A prokaryotic cell, because it lacks a membrane-enclosed nucleus and membrane-bound organelles.
A prokaryotic cell, because it contains ribosomes for protein synthesis.
A eukaryotic cell, because it possesses a plasma membrane and ribosomes.
Q 2/10
Score 0
Which of the following cellular components provides the most definitive evidence that a cell is eukaryotic rather than prokaryotic when observed under a high-magnification microscope?
30
The presence of a rigid cell wall located outside the plasma membrane.
The presence of 70S ribosomes used for the translation of mRNA.
The presence of a double-membrane envelope surrounding the genetic material.
The presence of a flagellum used for cellular locomotion.
10 questions
Q.
A student is examining a cell under an electron microscope and observes the presence of a plasma membrane, ribosomes, and a circular DNA molecule located in a region called the nucleoid, but no membrane-bound organelles. Into which category should this cell be classified?
1
30 sec
Q.
Which of the following cellular components provides the most definitive evidence that a cell is eukaryotic rather than prokaryotic when observed under a high-magnification microscope?
2
30 sec
Q.
Which of the following describes a structural similarity between prokaryotic and eukaryotic cells that supports the theory of a common evolutionary ancestry?
3
30 sec
Q.
An unknown cell is treated with a chemical that specifically inhibits the function of the Golgi apparatus. If the cell's processes are not affected by this chemical, which of the following is the most likely identity of the cell?
4
30 sec
Q.
If a researcher discovers a new unicellular organism and determines that the chemical reactions of the Citric Acid Cycle (Krebs Cycle) occur across the plasma membrane rather than within a specialized internal organelle, how should this organism be classified?
5
30 sec
Q.
6
30 sec
Q.
A researcher is studying a group of cells and discovers that while both groups synthesize proteins, Group A utilizes ribosomes that are free-floating in the cytoplasm and bound to a complex network of internal membranes, while Group B only utilizes ribosomes suspended in the cytosol. Which of the following is the most accurate conclusion?
7
30 sec
Q.
An analysis of a cell's DNA reveals that the total percentage of the genome consisting of non-coding introns is nearly zero, and the genetic material is found in a single, circular arrangement. Which of the following structural features would you also expect to find in this specific cell?
8
30 sec
Q.
A team of microbiologists identifies an organism that possesses a cell wall primarily composed of peptidoglycan. Upon further investigation, the researchers observe that the cell's genetic material is contained in a single, circular chromosome that is not enclosed by a nuclear envelope. What is the most likely categorization of this organism?
9
30 sec
Q.
A scientist is observing a cell and identifies a structure consisting of a system of flattened, membrane-bound sacs called thylakoids. Which of the following statements correctly evaluates the nature of this cell based on this observation?
