Concept explainers
Introduction:
Cells are the smallest unit in every single living being. In a group, they carry all the functions to sustain life.
They are the building blocks for animals and plants to live and sustain life.
Answer to Problem 1DYKB
Correct Answer: option (C) Replacing cells through cell division.
Explanation of Solution
Explanation/justification for the correct answer:
Option c. Replacing cells through cell division.
Some cells such as neurons or in plant tissues like parenchyma cells do not perform cell division. These cells can survive without performing cell division. In the case of parenchyma cells, which are also called permanent tissues, they provide structural support to the plant.
The explanation for the incorrect answer:
Option a. Obtaining nutrients and chemical building blocks.
Cells obtain nutrients like sugar or fat; they do this to provide the cell with energy. This function is necessary for all types of cells to keep functioning.
Option b. Maintaining the integrity of the plasma membrane.
Maintaining plasma membrane integrity is essential for cellular homeostasis.
The cell membrane receives damage from the intracellular and extracellular environment to avoid lethal consequences maintaining the integrity of the cell membrane is important.
Option d. Disposing types of wastes.
For cells to function properly, the disposal of waste is necessary.
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Chapter 4 Solutions
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- Cell membranes consist mainly of a _________. a. carbohydrate bilayer and proteins b. protein bilayer and phospholipids c. phospholipid bilayer and proteinsarrow_forwardThe plasma membrane __________. a. surrounds the cytoplasm b. separates the nucleus from the cytoplasm c. separates the cell interior from the environment d. both a and carrow_forwardAssign a function(s) to the following cellular structures: a. plasma membrane b. mitochondrion c. nucleus d. ribosomearrow_forward
- The _________ is responsible for a eukaryotic cells shape, internal organization, and cell movement.arrow_forwardThe main function of the endomembrane system is ___________. a. building and modifying proteins and lipids b. isolating DNA from toxic substances c. secreting extracellular matrix onto the cell surface d. producing ATP by aerobic respirationarrow_forwardMost of a membranes diverse functions are carried out by ________ . a. proteins c. nucleic acids b. phospholipids d. hormonesarrow_forward
- Which plasma membrane component can be either found on its surface or embedded in the membrane structure? a. protein b. cholesterol c. carbohydrate d. phospholipidarrow_forwardWhich of the following can diffuse most easily through the cell membrane? N2 Ca++ glucose The hormone glucagon (a protein)arrow_forwardThe major function of the plasma membrane is to: define the structure of the organelles. provide genetic information for the cell. synthesize chemicals for metabolism. regulate the passage of molecules and ions.arrow_forward
- Each of the following is a main idea of the cell theory except ____. -all organsims are composed of cells. -the cell is the basic unit of life. -all cells are similar in structure and function. -all cells come from preexisting cells.arrow_forwardWhich of the following correctly predicts what would happen to a body cell if its processes were interrupted during mitosis? Top of Form Cells would begin dividing uncontrollably. Chromosomes would not separate into two nuclei. Cytokinesis would occur more rapidly. The cell would not be able to grow any further.arrow_forwardThe movement of molecules that expends energy to move potassium ions into the cell and a different number of sodium ions out of the cell Simple Diffusion Facilitated Diffusion Osmosis Sodium-Potassium Pumparrow_forward
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