BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
10th Edition
ISBN: 9781305967359
Author: STARR
Publisher: CENGAGE L
bartleby

Concept explainers

bartleby

Videos

Textbook Question
Book Icon
Chapter 10, Problem 1SA

Gene expression does not vary by ________.

a. cell type c. stage of development
b. extracellular conditions d. the genetic code
Expert Solution & Answer
Check Mark
Summary Introduction

Introduction:

Gene expression refers to the process in which the information present in the genes is used to obtain functional gene products in the form of proteins. The response of a cell varies with rate of gene expression.

Answer to Problem 1SA

Correct answer:

The genetic code does not alter the gene expression. Hence, the correct answer is option d.

Explanation of Solution

Reason for correct answer:

Option d. is given as “the genetic code.”

The genetic code codes for an amino acid. Many amino acids make peptide bonds with each other to form a polypeptide. The change in genetic codes alters the protein expression, not the gene expression.

Reason for incorrect answer:

Option a. is given as, “cell type.”

The expression of gene changes in different types of cells or tissues. The genes are highly expressed in bone marrow, parathyroid gland, and in some regions of the brain. The lower level of gene expression can be found in regions like ovary and salivary gland. So, the cell type changes the gene expression. Hence, option a. is incorrect.

Option b. is given as “extracellular conditions.”

Extracellular condition like lack of nutrients, signals from the extracellular matrix affects the gene expression. The availability of the preferred nutrient in the surrounding starts transcribing genes in organisms, so its product allows the cell to utilize the nutrient. The unavailability of the nutrient stops the transcription of the genes. So, extracellular conditions can alter gene expression. Hence, option b. is incorrect.

Option c. is given as, “stage of development.”

During embryonic development, a cell differentiates to form tissues, organs, organ system, and then it finally forms an organism. This complete developmental process is regulated by a cascade of master gene expression. The product of these genes affects the expression of other genes. Therefore, developmental stages affect the expression of genes. Hence, option c. is incorrect.

Hence, the options a., b., and c. are incorrect.

Conclusion

Therefore, gene expression does not vary by the genetic code. Thus, the correct option is d.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
What is the difference between Uniporters, Symporters and Antiporters? Which of these are examples of active transport?
What are coupled transporters?
What are “domains” and how do they aid in protein function?
Knowledge Booster
Background pattern image
Biology
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.
Similar questions
SEE MORE QUESTIONS
Recommended textbooks for you
Text book image
Human Anatomy & Physiology (11th Edition)
Biology
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:PEARSON
Text book image
Biology 2e
Biology
ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:OpenStax
Text book image
Anatomy & Physiology
Biology
ISBN:9781259398629
Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher:Mcgraw Hill Education,
Text book image
Molecular Biology of the Cell (Sixth Edition)
Biology
ISBN:9780815344322
Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter Walter
Publisher:W. W. Norton & Company
Text book image
Laboratory Manual For Human Anatomy & Physiology
Biology
ISBN:9781260159363
Author:Martin, Terry R., Prentice-craver, Cynthia
Publisher:McGraw-Hill Publishing Co.
Text book image
Inquiry Into Life (16th Edition)
Biology
ISBN:9781260231700
Author:Sylvia S. Mader, Michael Windelspecht
Publisher:McGraw Hill Education
QCE Biology: Introduction to Gene Expression; Author: Atomi;https://www.youtube.com/watch?v=a7hydUtCIJk;License: Standard YouTube License, CC-BY