Concept explainers
Videos
Introduction:
Genes are a functional unit of heredity. They are passed on from parent generation to the progenies. Genes consist of DNA sequences that pass on specific information regarding cellular functioning. Genes are responsible for the synthesis of different types of proteins that perform the required function in the body.
Answer to Problem 1SQ
Correct answer:
The expression of a gene may depend on the type of organism, environmental conditions, and the type of cell. Hence, the correct answer is option d.
Explanation of Solution
Reason for correct answer:
Option d. is given as “all of the above.”
Gene expression depends on the type of organism. Some genes (such as insulin coding genes) are active in only a few animal species. Specific types of cells secrete certain proteins. Some of the hormonal proteins are secreted under specific environmental conditions. Gene expression depends on various factors, such as the type of organism, cell type, and environmental conditions.
Reason for incorrect answer:
Option a. is given as, “the type of organism.”
Not all the genes are expressed in all the organisms. Expression of genes depends on the type of organisms. Along with this, certain specific genes are expressed only in specialized cells. This makes the expression of genes dependent on the type of cell as well. Hence, option a. is incorrect.
Option b. is given as, “environmental conditions.”
Genes coding for certain hormonal proteins are expressed under specific environmental conditions. Not all the hormones are secreted in all species. This also makes gene expression dependent on the type of organism. Hence, option b. is incorrect.
Option c. is given as, “type of cell.”
Some genes are secreted in specific types of cells, for example, oncogenes are active only in tumor cells. Under certain environmental conditions, also, particular genes are activated. Hence, option c. is incorrect.
Hence, the options a., b., and c. are incorrect.
The type of organism, environmental conditions, and the type of cell, all determines the expression of a gene in an organism. Thus, the correct option is d.
Want to see more full solutions like this?
Chapter 10 Solutions
Biology: Concepts and Applications (MindTap Course List)
- What is the advantage of studying the mRNA present in a cell rather than the DNA? A. The mRNA is more chemically stable at room temperature. B. The mRNA identifies which genes are expressed. C. The mRNA identifies inheritance patterns. D. The mRNA is better able to undergo PCR.arrow_forwardMuscle cells differ from nerve cells mainly because they(A) express different genes.(B) contain different genes.(C) use different genetic codes.(D) have unique ribosomes.arrow_forward4) Goats have been genetically modified to produce an anticlotting protein in their milk. The protein is extracted from the milk and given to humans who have inherited a disorder that causes their bodies to produce blood clots. A benefit of the technology used to produce this protein is that it a) can be used by people to overcome the effects of a harmful mutation b) can provide people with a new kind of nutrient-rich milk c) will result in healthier goats with more nutritious milk for their offspring d) will reduce blood clots in other farm animals that are modified in this wayarrow_forward
- A geneticist interested in immune function induces random mutations in a number of specific genes in mice and then determines which of the resulting mutant mice have impaired immune function. This procedure is an example of a. forward genetics. b. reverse genetics. c. both forward and reverse genetics. d. neither forward nor reverse geneticsarrow_forwardThe Ames testa. provides a way to determine if any type of cell has experienced amutation.b. provides a way to determine if an agent is a mutagen.c. allows researchers to experimentally disrupt gene activity by causinga mutation in a specific gene.d. provides a way to repair mutations in bacterial cells.e. does all of the above.arrow_forwardWhen using gene therapy to treat an hereditary disease, the idea is to: A. Introduce the correct gene into the patient's DNA B. Inject the patient with a specific protein to cure the disease. C. Blood transfusions from healthy individuals. D. ntroduce mRNA molecules with the correct genetic information to the patient. E. Introduce a virus to the patient that will specifically destroy mutated cells.arrow_forward
- Take a look at A, which gene listed here is more likely to be carried over alongside it? A. Gene F B. None of them C. Gene C D. Gene Earrow_forwardGene expression can be viewed at which of the following levels?a. Molecular and cellular levelsb. Organism levelc. Population leveld. All of the abovearrow_forwardA person studying the rate of transcription of a particular gene is working in the field ofa. molecular genetics.b. transmission genetics.c. population genetics.d. None of the above is correct.arrow_forward
- Genetic Engineering is being used by the pharmaceutical industry. Which of the following is NOT currently one of the uses? Group of answer choices a. creation of products that will remove poisons from the bocy b. production of human insulin c. No answer text provided. d. production of human growth hormone e. genetic modification of plants to produce vaccinesarrow_forwardA student wants to observe how the environment of bacteria affects gene expression. How should the experiment be designed? A. exposing the same species of bacteria to the same carbohydrates in each sample B. exposing the same species of bacteria to different carbohydrates in each sample C. exposing different species of bacteria to the same carbohydrates in each sample D. exposing different species of bacteria to different carbohydrates in each samplearrow_forwardBishop and Varmus’s experiment was a landmark work in cancer biology. What was the question facing the scientists about src gene? Explain the experiment and how the results solved their question.arrow_forward
Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College