Cell Structure and Function Overview

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What is the key function of the cell plasma membrane?

Energy production

Regulation of substances entering and leaving the cell (correct)

Cell protection

Cellular communication

Which statement is part of the cell theory?

A cell is the basic unit of structure and function in living organisms. (correct)

Living organisms are not composed of cells.

All cells come from non-living matter.

Cells are all identical in structure and function.

What distinguishes prokaryotic cells from eukaryotic cells?

Prokaryotic cells lack membrane-bound organelles, while eukaryotic cells have them. (correct)

Eukaryotic cells are found only in plants, while prokaryotic cells are found only in animals.

Eukaryotic cells are always unicellular, while prokaryotic cells can be multicellular.

Prokaryotic cells have a nucleus, while eukaryotic cells do not.

What are the characteristics common to all cells?

Possession of genetic material and ability to replicate Signup and view all the answers

Why do most cells require a microscope to be seen?

They are too small to be seen by the naked eye. Signup and view all the answers

Which statement best describes the specialization of cells in our body?

Cell specialization allows each type to perform specific functions efficiently. Signup and view all the answers

What is the main reason biologists use microscopes and biochemistry to study cells?

Because cells are usually too small to be seen by the naked eye Signup and view all the answers

What is the main function of microvilli in the small intestine?

Increase surface area for absorption of nutrients Signup and view all the answers

Which type of microscope is best suited for studying organelles in eukaryotic cells?

Transmission electron microscopes (TEMs) Signup and view all the answers

What is the function of channel proteins in the plasma membrane?

Form tunnel for specific molecules Signup and view all the answers

What is the measure of the clarity of an image in microscopy?

Resolution Signup and view all the answers

Why do the polar heads of phospholipids in the plasma membrane face into the watery medium?

To form a hydrophobic barrier Signup and view all the answers

Why do small cells have a larger surface-area-to-volume ratio?

To provide more surface area for exchange of materials Signup and view all the answers

Which type of protein in the plasma membrane requires input of energy for the passage of molecules?

Transport proteins Signup and view all the answers

What is the primary function of light microscopes (LMs) according to the text?

To magnify cells effectively up to 1,000 times their actual size Signup and view all the answers

What is the function of receptor proteins in the plasma membrane?

Allow signal molecules to bind Signup and view all the answers

What is the main reason electron microscopes (EMs) are used to study subcellular structures?

To achieve very high magnification levels (up to 2 million times) Signup and view all the answers

Which feature marks the boundary between outside and inside of a cell?

Plasma membrane Signup and view all the answers

What is the main function of junction proteins in cells?

Form junctions between cells for adhesion and communication Signup and view all the answers

Which component of the cell serves as the site of protein synthesis?

Ribosomes Signup and view all the answers

In terms of genetic material, what is a distinguishing feature between prokaryotic and eukaryotic cells?

Eukaryotic cells have multiple chromosomes, while prokaryotic cells have only one chromosome Signup and view all the answers

Which type of cell division is characteristic of somatic cells in eukaryotes?

Mitosis Signup and view all the answers

What is a distinguishing feature in the size comparison between prokaryotic and eukaryotic cells?

Prokaryotic cells are smaller and simpler compared to eukaryotic cells Signup and view all the answers

Which of the following statements is true about membrane-bound organelles within a cell?

Only eukaryotic cells contain membrane-bound organelles Signup and view all the answers

Cell Structure and Function Overview

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Questions and Answers

What is the key function of the cell plasma membrane?

Which statement is part of the cell theory?

What distinguishes prokaryotic cells from eukaryotic cells?

What are the characteristics common to all cells?

Why do most cells require a microscope to be seen?

Which statement best describes the specialization of cells in our body?

What is the main reason biologists use microscopes and biochemistry to study cells?

What is the main function of microvilli in the small intestine?

Which type of microscope is best suited for studying organelles in eukaryotic cells?

What is the function of channel proteins in the plasma membrane?

What is the measure of the clarity of an image in microscopy?

Why do the polar heads of phospholipids in the plasma membrane face into the watery medium?

Why do small cells have a larger surface-area-to-volume ratio?

Which type of protein in the plasma membrane requires input of energy for the passage of molecules?

What is the primary function of light microscopes (LMs) according to the text?

What is the function of receptor proteins in the plasma membrane?

What is the main reason electron microscopes (EMs) are used to study subcellular structures?

Which feature marks the boundary between outside and inside of a cell?

What is the main function of junction proteins in cells?

Which component of the cell serves as the site of protein synthesis?

In terms of genetic material, what is a distinguishing feature between prokaryotic and eukaryotic cells?

Which type of cell division is characteristic of somatic cells in eukaryotes?

What is a distinguishing feature in the size comparison between prokaryotic and eukaryotic cells?

Which of the following statements is true about membrane-bound organelles within a cell?

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