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Concept explainers
Introduction:
The cell is the basic “fundamental unit” of life. Every organism present in the environment is composed of cell. Cells perform a number of important activities that help in the survival of an organism. These activities are known as cellular activities.
![Check Mark](/static/check-mark.png)
Answer to Problem 1SQ
Correct answer:
All the cells have three basic structures. These are plasma membrane, cytoplasm, and DNA. Hence, the correct answer is option c.
Explanation of Solution
Reason for correct answer:
Option c. is given as “cytoplasm, DNA, and a plasma membrane.”
Every cell contains three basic structures that form a complete cellular unit. These three structures are:
• Plasma membrane:
The outer layer of cell that acts as a barrier is known as the plasma membrane. It surrounds all the cellular units and protects them from the external environment.
• Cytoplasm:
It is the middle layer of the cell. All the internal components of the cell are present in the cytoplasm.
• DNA:
DNA stands for “Deoxyribonucleic acid.” It is the genetic material present in the organisms that guide them to perform all the cellular activities.
Therefore, every cell contains these three basic units (plasma membrane, cytoplasm, and DNA).
Reason for incorrect answer:
Option a. is given as, “cytoplasm, DNA and, organelles with membranes.”
Every cell contains cytoplasm and DNA. The cell can have two types of organelles, one with membrane and other without a membrane. This indicates that it is not necessary that a cell contains an organelle with a membrane. Hence, option a. is incorrect.
Option b. is given as, “a plasma membrane, DNA, and a nuclear envelope.”
Plasma membrane and DNA are two important components that are present in every cell. However, it is not necessary that every cell has a nuclear envelope. For example, prokaryotes lack nuclear envelope but eukaryotes contain a well-defined nuclear membrane. Hence, option b. is incorrect.
Option d. is given as, “a cell wall, cytoplasm, and DNA..”
Every cell contains a cell wall and DNA. However, every cell does not contain a cell wall. For example, the plant cell has a cell wall but animal cells lack a cell wall. Hence, option d. is incorrect.
Hence, the options a., b., and d. are incorrect.
The three basic components present in every cell are cytoplasm, plasma membrane, and DNA. Thus, the correct option is c.
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Chapter 4 Solutions
EBK BIOLOGY: CONCEPTS AND APPLICATIONS
- 18. Watch this short youtube video about SARS CoV-2 replication. SARS-CoV-2 Life Cycle (Summer 2020) - YouTube.19. What is the name of the receptor that SARS CoV-2 uses to enter cells? Which human cells express this receptor? 20. Name a few of the proteins that the SARS CoV-2 mRNA codes for. 21. What is the role of the golgi apparatus related to SARS CoV-2arrow_forwardState the five functions of Globular Proteins, and give an example of a protein for each function.arrow_forwardDiagram of check cell under low power and high powerarrow_forward
- a couple in which the father has the a blood type and the mother has the o blood type produce an offspring with the o blood type, how does this happen? how could two functionally O parents produce an offspring that has the a blood type?arrow_forwardWhat is the opening indicated by the pointer? (leaf x.s.) stomate guard cell lenticel intercellular space none of thesearrow_forwardIdentify the indicated tissue? (stem x.s.) parenchyma collenchyma sclerenchyma ○ xylem ○ phloem none of thesearrow_forward
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- Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College
- Human Physiology: From Cells to Systems (MindTap ...BiologyISBN:9781285866932Author:Lauralee SherwoodPublisher:Cengage Learning
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