Q: Which equation best represents the organization of chromatin in the nucleus?

$$\text{Chromatin} = \text{DNA} + \text{Histone Proteins}$$

Q: Which equation correctly represents the flow of genetic information in a eukaryotic cell?

$$\text{DNA} \rightarrow \text{mRNA} \rightarrow \text{Protein}$$

Question 1

Which of the following best describes the function of ribosomes in eukaryotic cells?

Accepted Answer

They produce proteins by translating mRNA.

Question 2

A scientist observes a cell with a plasma membrane, cytoplasm, DNA, and ribosomes, but no membrane-bound organelles. What type of cell is this most likely to be?

Accepted Answer

Prokaryotic cell

Question 3

Which organelle is responsible for synthesizing membrane lipids and metabolizing carbohydrates?

Accepted Answer

Smooth endoplasmic reticulum (ER)

Question 4

What is the main difference between the plasma membrane of plant cells and animal cells?

Accepted Answer

Plant cells have a cell wall in addition to the plasma membrane.

Question 5

Which of the following statements about the nuclear envelope is correct?

Accepted Answer

It contains nuclear pores that regulate the movement of molecules in and out of the nucleus.

Question 6

A mutation disrupts the function of tubulin in a cell. Which cellular structure would be most affected?

Accepted Answer

Microtubules

Question 7

Which equation best represents the organization of chromatin in the nucleus?

Accepted Answer

$$	ext{Chromatin} = 	ext{DNA} + 	ext{Histone Proteins}$$

Question 8

Which of the following best explains why the plasma membrane is described as having hydrophilic and hydrophobic regions?

Accepted Answer

It is made of phospholipids with hydrophilic heads and hydrophobic tails.

Question 9

A cell is unable to secrete proteins properly. Which organelle is most likely malfunctioning?

Accepted Answer

Golgi apparatus

Question 10

Which of the following junctions allows ions and small molecules to flow directly from one cell to another for communication?

Accepted Answer

Gap junctions

Question 11

If a cell's rough ER is damaged, which process would be most directly affected?

Accepted Answer

Protein synthesis for secretion

Question 12

Which of the following is NOT a function of the smooth endoplasmic reticulum?

Accepted Answer

Producing proteins for export

Question 13

Which organelle is responsible for energy production in eukaryotic cells?

Accepted Answer

Mitochondria

Question 14

A researcher finds that a cell cannot form leakproof sheets. Which cellular structure is most likely defective?

Accepted Answer

Tight junctions

Question 15

Which of the following best describes the role of microfilaments in the cytoskeleton?

Accepted Answer

They are made of actin protein and help with cell movement.

Question 16

Which process involves the conversion of DNA to mRNA so that information can be sent to ribosomes?

Accepted Answer

Transcription

Question 17

Which equation correctly represents the flow of genetic information in a eukaryotic cell?

Accepted Answer

$$	ext{DNA} ightarrow 	ext{mRNA} ightarrow 	ext{Protein}$$

Question 18

Which organelle receives vesicles from the ER and processes them for secretion or incorporation into the cell membrane?

Accepted Answer

Golgi apparatus

Question 19

A cell is observed to have ribosomes bound to its endoplasmic reticulum. What is the primary function of this rough ER?

Accepted Answer

Protein synthesis for export or membrane insertion

Question 20

Which of the following best describes the function of anchoring junctions?

Accepted Answer

They rivet cells into strong tissue.

Eukaryotic Cell Structure and Function: Study Notes for General Biology

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