Introduction: Mechanism of expression of genes is regulated by various types of gene products. These genes can be switched on or off during the course of gene expression. Some genes express continuously, while some express only at the time of need of their expression.
Answer to Problem 1TY
Correct answer: Genes that are expressed at all time constantly are called constitutive genes. Hence, the correct answer is option d.
Explanation of Solution
Reason for correct answer:
Constitutive genes are those genes which express at constant levels at all time. Products of such genes regulate processes associated with biochemical activities of cells.
Option d. is given as “constitutive”.
Constitutive genes are special genes that are expressed at constant levels at every time for effective regulation of gene expression process. Hence, the correct answer is option d.
Reasons for incorrect answer:
Option a. is given as, “inducible”.
Inducible genes are genes whose activity is controlled by the external factors. These genes are not expressed all the times in the cell. Hence, option a. is incorrect.
Option b. is given as, “repressible”.
Repressible genes are genes whose activity is affected at the time of higher concentration of products. High product concentration represses these genes to maintain constant level of products in the cell. These genes are not expressed at all time at constant levels in the cell. Hence, option b. is incorrect.
Option c. is given as, “positive”.
No positive genes are associated with the gene regulation process. Hence, option c. is incorrect.
Option e. is given as, “negative”.
No negative genes are associated with the gene regulation and expression mechanisms. Hence, option e. is incorrect.
Hence, the options a., b. ,c., and e. are incorrect.
Constitutive genes express continuously at constant levels in the cell and perform a vital role in the regulation of gene expression.
Want to see more full solutions like this?
Chapter 14 Solutions
BIOLOGY
- What are Clathrin coated vesicles and what is their function?arrow_forwardHow is a protein destined for the Endoplasmic Reticulum (ER), imported into the ER? Be concise.arrow_forwardFind out about the organisations and the movements aimed at the conservation of our natural resources. Eg Chipko movement and Greenpeace. Make a project report on such an organisation.arrow_forward
- What are biofertilizers and mention the significancearrow_forwardPCBs and River Otters: Otters in Washington State’s Green-Duwamish River have high levels of polychlorinated biphenyls (PCBs) in their livers. PCBs can bind to the estrogen receptors in animals and disrupt the endocrine system of these otters. The PCBs seem to increase the estrogen to androgen ratio, skewing the ratio toward too much estrogen. How would increased estrogen affect the river otter population? Based on your reading of the materials in this unit, what factors can affect fertility in humans? Explain how each of the factors affecting human fertility that you described can disrupt the human endocrine system to affect reproduction.arrow_forwardOther than oil and alcohol, are there other liquids you could compare to water (that are liquid at room temperature)? How is water unique compared to these other liquids? What follow-up experiment would you like to do, and how would you relate it to your life?arrow_forward
- Selection of Traits What adaptations do scavengers have for locating and feeding on prey? What adaptations do predators have for capturing and consuming prey?arrow_forwardCompetition Between Species What natural processes limit populations from growing too large? What are some resources organisms can compete over in their natural habitat?arrow_forwardSpecies Interactions Explain how predators, prey and scavengers interact. Explain whether predators and scavengers are necessary or beneficial for an ecosystem.arrow_forward
- magine that you are conducting research on fruit type and seed dispersal. You submitted a paper to a peer-reviewed journal that addresses the factors that impact fruit type and seed dispersal mechanisms in plants of Central America. The editor of the journal communicates that your paper may be published if you make ‘minor revisions’ to the document. Describe two characteristics that you would expect in seeds that are dispersed by the wind. Contrast this with what you would expect for seeds that are gathered, buried or eaten by animals, and explain why they are different. (Editor’s note: Providing this information in your discussion will help readers to consider the significance of the research).arrow_forwardWhat is the difference between Uniporters, Symporters and Antiporters? Which of these are examples of active transport?arrow_forwardWhat are coupled transporters?arrow_forward
- Comprehensive Medical Assisting: Administrative a...NursingISBN:9781305964792Author:Wilburta Q. Lindh, Carol D. Tamparo, Barbara M. Dahl, Julie Morris, Cindy CorreaPublisher:Cengage LearningConcepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College
- Biology Today and Tomorrow without Physiology (Mi...BiologyISBN:9781305117396Author:Cecie Starr, Christine Evers, Lisa StarrPublisher:Cengage LearningBiology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage LearningHuman Heredity: Principles and Issues (MindTap Co...BiologyISBN:9781305251052Author:Michael CummingsPublisher:Cengage Learning