BROOKER BIOLOGY
BROOKER BIOLOGY
5th Edition
ISBN: 9781307656152
Author: BROOKER
Publisher: MCG/CREATE
bartleby

Concept explainers

bartleby

Videos

Question
Book Icon
Chapter 9, Problem 1TY
Summary Introduction

Introduction: Cells respond to the changing environment, such as light, water, nutrient that causes some change in cell. These cellular changes enable a cell to adapt with respect to the changing environment.

Expert Solution & Answer
Check Mark

Answer to Problem 1TY

Correct answer: An agent that allows a cell to respond to changes in its environment is known as a signal. Hence, the correct answer is an option d.

Explanation of Solution

Reason for correct answer:

The biological system such as a cell responds to changes in the environment with the help of a signal. Cell signaling involves many stepwise changes in the cell, such as activation of receptor, signal transduction, and a response by the cell. Therefore, a signal is an agent, which helps various cell processes to cope with the environmental changes.

Option (d) is given as “a signal”.

A signal is an agent that help cells to respond to changes in the environment. Hence, option d. is correct.

Reasons for incorrect answer:

Option a. is given as, “a cell surface receptor”.

Cell surface receptors are present on the cell membrane and it binds to the specific molecules. Therefore, cell surface receptors are involved in cellular signaling process. Hence, option a. is incorrect.

Option b. is given as, “an intracellular receptor”.

The receptors that are present inside the cell are known as intracellular receptor. They are involved in cellular signaling process. Hence, option b. is incorrect.

Option c. is given as, “a structural protein”.

Cell membrane contains structural proteins and it confer a particular shape to the cell. Hence, option c. is incorrect.

Option e. is given as, “apoptosis”.

The programmed cell death is termed as apoptosis. It is a part of cell signaling, but this process does not signal a cellular response. Hence, option e. is incorrect.

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

Conclusion

A cell responds to changes in the environment through an agent known as “signal”.

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
In order to establish the expiration date of perishable food, growth curve data must be collected. Once the microbial load is so high that it poses a hazard to human health, the food item is no longer considered safe (expired). Generally a load of x50,000 bacteria/gram is considered unsafe. Your task is to determine the microbial growth curves for MicroYo, a new brand of yogurt. The growth is determined by sampling the yogurt and growing the bacterial isolates in broth culture which is then serially diluted by a total of x10,000 and inoculated onto standard petri plates of nutrient agar. The following colony counts are measured: Time (days) MicroYo colony count# 1 1 4 1 12 2 16 20 4 7 What day should you recommend expiring the yogurt (the last possible date before the microbial load is unsafe). 12 4 20 16
9. Chicken combs in chickens is an example where you see interactions between genes. See potential genotypes and phenotypes below. Which genotype, when mated to a rose comb chicken, will produce progeny that are 50% walnut comb and 50% pea comb? walnut (RRPP) walnut (RrPP) pea (rrPP) walnut (RRPP) walnut (RrPp) pea (rrPp) rose rose single (RRPP) (Rrpp) (rrpp)
Describe a compound light microscope and its importance in microbiology (2) examples of at least two microbes viewed under a compound light microscope and their general characteristics (note: the microbes you choose do not need to be the ones outlined in the above tutorial video) and (3) at least one source you used for the information included in your infographic.
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
Biology (MindTap Course List)
Biology
ISBN:9781337392938
Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher:Cengage Learning
Text book image
Biology: The Dynamic Science (MindTap Course List)
Biology
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Cengage Learning
Text book image
Human Heredity: Principles and Issues (MindTap Co...
Biology
ISBN:9781305251052
Author:Michael Cummings
Publisher:Cengage Learning
Text book image
Concepts of Biology
Biology
ISBN:9781938168116
Author:Samantha Fowler, Rebecca Roush, James Wise
Publisher:OpenStax College
Text book image
Biomedical Instrumentation Systems
Chemistry
ISBN:9781133478294
Author:Chatterjee
Publisher:Cengage
Text book image
Body Structures & Functions Updated
Biology
ISBN:9780357191606
Author:Scott
Publisher:Cengage
Intro to Cell Signaling; Author: Amoeba Sisters;https://www.youtube.com/watch?v=-dbRterutHY;License: Standard youtube license