In prokaryotes, control of gene expression usually occurs at the a. splicing of pre-mRNA into mature mRNA. b. initiation of translation. c. initiation of transcription. d. All of the choices are correct.

Question

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Answer 1

Textbook Question

Chapter 16, Problem 1U

In prokaryotes, control of gene expression usually occurs at the

a. splicing of pre-mRNA into mature mRNA.

b. initiation of translation.

c. initiation of transcription.

d. All of the choices are correct.

Expert Solution & Answer

Summary Introduction

Introduction:

The genes can be defined as the sequence of the nucleotides, which codes for the function in a genome. It could be DNA (deoxyribonucleic acid) or RNA (ribonucleic acid). There are certain genes which express continuously in all the cells, these are known as the housekeeping genes. The expression of other kinds of genes is regulated.

Answer to Problem 1U

Correct answer:

In prokaryotes, the expression of the gene is usually regulated at the initiation of transcription. Therefore, option c is correct.

Explanation of Solution

Reasons for the correct statement:

The regulation of the expression of the genes is regulated at different stages. The genetic information from the DNA is passed on to the mRNA (messenger ribonucleic acid), which is then passed onto the proteins. The expression of the gene is regulated at the initiation of the transcription. This step of regulation is most studied.

Option c is given as “initiation of transcription”.

As, “the regulation of the gene expression in prokaryotes occurs at the initiation of the transcription”, is the right answer.

Hence, option c is correct.

Reasons for the incorrect statements:

Option a is given as “splicing of pre- mRNA into the mature mRNA ”.

The splicing is the process through which the heterogeneous or pre- mRNA gets transformed into the mature mRNA with the removal of the introns. This is not a regulatory mechanism. So, it is a wrong answer.

Option b is given as “initiation of translation”.

In some of the prokaryotes, the control of the gene expression occurs at the initiation of the translation; however, it is not very common. So, it is a wrong answer.

Option d is given as “all of the choices are correct”.

The splicing is not the regulatory mechanism and the regulation at the initiation of the translation occurs in some genes. So, it is a wrong answer.

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

Conclusion

The regulation of the gene takes place at the level of initiation of transcription mostly. This kind of regulation is the most studied. The regulation of the gene allows the differential expression of the proteins.

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*Example 2: Tracing the path of an autosomal dominant trait Trait: Neurofibromatosis Forms of the trait: The dominant form is neurofibromatosis, caused by the production of an abnormal form of the protein neurofibromin. Affected individuals show spots of abnormal skin pigmentation and non-cancerous tumors that can interfere with the nervous system and cause blindness. Some tumors can convert to a cancerous form. i The recessive form is a normal protein - in other words, no neurofibromatosis.moovi A typical pedigree for a family that carries neurofibromatosis is shown below. Note that carriers are not indicated with half-colored shapes in this chart. Use the letter "N" to indicate the dominant neurofibromatosis allele, and the letter "n" for the normal allele. Nn nn nn 2 nn Nn A 3 N-

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Answer 2

Textbook Question

Chapter 16, Problem 1U

In prokaryotes, control of gene expression usually occurs at the

a. splicing of pre-mRNA into mature mRNA.

b. initiation of translation.

c. initiation of transcription.

d. All of the choices are correct.

Expert Solution & Answer

Summary Introduction

Introduction:

The genes can be defined as the sequence of the nucleotides, which codes for the function in a genome. It could be DNA (deoxyribonucleic acid) or RNA (ribonucleic acid). There are certain genes which express continuously in all the cells, these are known as the housekeeping genes. The expression of other kinds of genes is regulated.

Answer to Problem 1U

Correct answer:

In prokaryotes, the expression of the gene is usually regulated at the initiation of transcription. Therefore, option c is correct.

Explanation of Solution

Reasons for the correct statement:

The regulation of the expression of the genes is regulated at different stages. The genetic information from the DNA is passed on to the mRNA (messenger ribonucleic acid), which is then passed onto the proteins. The expression of the gene is regulated at the initiation of the transcription. This step of regulation is most studied.

Option c is given as “initiation of transcription”.

As, “the regulation of the gene expression in prokaryotes occurs at the initiation of the transcription”, is the right answer.

Hence, option c is correct.

Reasons for the incorrect statements:

Option a is given as “splicing of pre- mRNA into the mature mRNA ”.

The splicing is the process through which the heterogeneous or pre- mRNA gets transformed into the mature mRNA with the removal of the introns. This is not a regulatory mechanism. So, it is a wrong answer.

Option b is given as “initiation of translation”.

In some of the prokaryotes, the control of the gene expression occurs at the initiation of the translation; however, it is not very common. So, it is a wrong answer.

Option d is given as “all of the choices are correct”.

The splicing is not the regulatory mechanism and the regulation at the initiation of the translation occurs in some genes. So, it is a wrong answer.

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

Conclusion

The regulation of the gene takes place at the level of initiation of transcription mostly. This kind of regulation is the most studied. The regulation of the gene allows the differential expression of the proteins.

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Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 3

Textbook Question

Chapter 16, Problem 1U

In prokaryotes, control of gene expression usually occurs at the

a. splicing of pre-mRNA into mature mRNA.

b. initiation of translation.

c. initiation of transcription.

d. All of the choices are correct.

Expert Solution & Answer

Summary Introduction

Introduction:

The genes can be defined as the sequence of the nucleotides, which codes for the function in a genome. It could be DNA (deoxyribonucleic acid) or RNA (ribonucleic acid). There are certain genes which express continuously in all the cells, these are known as the housekeeping genes. The expression of other kinds of genes is regulated.

Answer to Problem 1U

Correct answer:

In prokaryotes, the expression of the gene is usually regulated at the initiation of transcription. Therefore, option c is correct.

Explanation of Solution

Reasons for the correct statement:

The regulation of the expression of the genes is regulated at different stages. The genetic information from the DNA is passed on to the mRNA (messenger ribonucleic acid), which is then passed onto the proteins. The expression of the gene is regulated at the initiation of the transcription. This step of regulation is most studied.

Option c is given as “initiation of transcription”.

As, “the regulation of the gene expression in prokaryotes occurs at the initiation of the transcription”, is the right answer.

Hence, option c is correct.

Reasons for the incorrect statements:

Option a is given as “splicing of pre- mRNA into the mature mRNA ”.

The splicing is the process through which the heterogeneous or pre- mRNA gets transformed into the mature mRNA with the removal of the introns. This is not a regulatory mechanism. So, it is a wrong answer.

Option b is given as “initiation of translation”.

In some of the prokaryotes, the control of the gene expression occurs at the initiation of the translation; however, it is not very common. So, it is a wrong answer.

Option d is given as “all of the choices are correct”.

The splicing is not the regulatory mechanism and the regulation at the initiation of the translation occurs in some genes. So, it is a wrong answer.

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

Conclusion

The regulation of the gene takes place at the level of initiation of transcription mostly. This kind of regulation is the most studied. The regulation of the gene allows the differential expression of the proteins.

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!

Answer 4

Textbook Question

Chapter 16, Problem 1U

In prokaryotes, control of gene expression usually occurs at the

a. splicing of pre-mRNA into mature mRNA.

b. initiation of translation.

c. initiation of transcription.

d. All of the choices are correct.

Expert Solution & Answer

Summary Introduction

Introduction:

The genes can be defined as the sequence of the nucleotides, which codes for the function in a genome. It could be DNA (deoxyribonucleic acid) or RNA (ribonucleic acid). There are certain genes which express continuously in all the cells, these are known as the housekeeping genes. The expression of other kinds of genes is regulated.

Answer to Problem 1U

Correct answer:

In prokaryotes, the expression of the gene is usually regulated at the initiation of transcription. Therefore, option c is correct.

Explanation of Solution

Reasons for the correct statement:

The regulation of the expression of the genes is regulated at different stages. The genetic information from the DNA is passed on to the mRNA (messenger ribonucleic acid), which is then passed onto the proteins. The expression of the gene is regulated at the initiation of the transcription. This step of regulation is most studied.

Option c is given as “initiation of transcription”.

As, “the regulation of the gene expression in prokaryotes occurs at the initiation of the transcription”, is the right answer.

Hence, option c is correct.

Reasons for the incorrect statements:

Option a is given as “splicing of pre- mRNA into the mature mRNA ”.

The splicing is the process through which the heterogeneous or pre- mRNA gets transformed into the mature mRNA with the removal of the introns. This is not a regulatory mechanism. So, it is a wrong answer.

Option b is given as “initiation of translation”.

In some of the prokaryotes, the control of the gene expression occurs at the initiation of the translation; however, it is not very common. So, it is a wrong answer.

Option d is given as “all of the choices are correct”.

The splicing is not the regulatory mechanism and the regulation at the initiation of the translation occurs in some genes. So, it is a wrong answer.

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

Conclusion

The regulation of the gene takes place at the level of initiation of transcription mostly. This kind of regulation is the most studied. The regulation of the gene allows the differential expression of the proteins.

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!

Answer 5

Textbook Question

Answer 6

Textbook Question

Answer 7

Expert Solution & Answer

Summary Introduction

Introduction:

The genes can be defined as the sequence of the nucleotides, which codes for the function in a genome. It could be DNA (deoxyribonucleic acid) or RNA (ribonucleic acid). There are certain genes which express continuously in all the cells, these are known as the housekeeping genes. The expression of other kinds of genes is regulated.

Answer to Problem 1U

Correct answer:

In prokaryotes, the expression of the gene is usually regulated at the initiation of transcription. Therefore, option c is correct.

Explanation of Solution

Reasons for the correct statement:

The regulation of the expression of the genes is regulated at different stages. The genetic information from the DNA is passed on to the mRNA (messenger ribonucleic acid), which is then passed onto the proteins. The expression of the gene is regulated at the initiation of the transcription. This step of regulation is most studied.

Option c is given as “initiation of transcription”.

As, “the regulation of the gene expression in prokaryotes occurs at the initiation of the transcription”, is the right answer.

Hence, option c is correct.

Reasons for the incorrect statements:

Option a is given as “splicing of pre- mRNA into the mature mRNA ”.

The splicing is the process through which the heterogeneous or pre- mRNA gets transformed into the mature mRNA with the removal of the introns. This is not a regulatory mechanism. So, it is a wrong answer.

Option b is given as “initiation of translation”.

In some of the prokaryotes, the control of the gene expression occurs at the initiation of the translation; however, it is not very common. So, it is a wrong answer.

Option d is given as “all of the choices are correct”.

The splicing is not the regulatory mechanism and the regulation at the initiation of the translation occurs in some genes. So, it is a wrong answer.

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

Conclusion

The regulation of the gene takes place at the level of initiation of transcription mostly. This kind of regulation is the most studied. The regulation of the gene allows the differential expression of the proteins.

Answer 8

Expert Solution & Answer

Summary Introduction

Introduction:

The genes can be defined as the sequence of the nucleotides, which codes for the function in a genome. It could be DNA (deoxyribonucleic acid) or RNA (ribonucleic acid). There are certain genes which express continuously in all the cells, these are known as the housekeeping genes. The expression of other kinds of genes is regulated.

Answer to Problem 1U

Correct answer:

In prokaryotes, the expression of the gene is usually regulated at the initiation of transcription. Therefore, option c is correct.

Explanation of Solution

Reasons for the correct statement:

The regulation of the expression of the genes is regulated at different stages. The genetic information from the DNA is passed on to the mRNA (messenger ribonucleic acid), which is then passed onto the proteins. The expression of the gene is regulated at the initiation of the transcription. This step of regulation is most studied.

Option c is given as “initiation of transcription”.

As, “the regulation of the gene expression in prokaryotes occurs at the initiation of the transcription”, is the right answer.

Hence, option c is correct.

Reasons for the incorrect statements:

Option a is given as “splicing of pre- mRNA into the mature mRNA ”.

The splicing is the process through which the heterogeneous or pre- mRNA gets transformed into the mature mRNA with the removal of the introns. This is not a regulatory mechanism. So, it is a wrong answer.

Option b is given as “initiation of translation”.

In some of the prokaryotes, the control of the gene expression occurs at the initiation of the translation; however, it is not very common. So, it is a wrong answer.

Option d is given as “all of the choices are correct”.

The splicing is not the regulatory mechanism and the regulation at the initiation of the translation occurs in some genes. So, it is a wrong answer.

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

Conclusion

The regulation of the gene takes place at the level of initiation of transcription mostly. This kind of regulation is the most studied. The regulation of the gene allows the differential expression of the proteins.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Summary Introduction

Introduction:

The genes can be defined as the sequence of the nucleotides, which codes for the function in a genome. It could be DNA (deoxyribonucleic acid) or RNA (ribonucleic acid). There are certain genes which express continuously in all the cells, these are known as the housekeeping genes. The expression of other kinds of genes is regulated.

Answer 12

Answer to Problem 1U

Correct answer:

In prokaryotes, the expression of the gene is usually regulated at the initiation of transcription. Therefore, option c is correct.

Answer 13

Explanation of Solution

Reasons for the correct statement:

The regulation of the expression of the genes is regulated at different stages. The genetic information from the DNA is passed on to the mRNA (messenger ribonucleic acid), which is then passed onto the proteins. The expression of the gene is regulated at the initiation of the transcription. This step of regulation is most studied.

Option c is given as “initiation of transcription”.

As, “the regulation of the gene expression in prokaryotes occurs at the initiation of the transcription”, is the right answer.

Hence, option c is correct.

Reasons for the incorrect statements:

Option a is given as “splicing of pre- mRNA into the mature mRNA ”.

The splicing is the process through which the heterogeneous or pre- mRNA gets transformed into the mature mRNA with the removal of the introns. This is not a regulatory mechanism. So, it is a wrong answer.

Option b is given as “initiation of translation”.

In some of the prokaryotes, the control of the gene expression occurs at the initiation of the translation; however, it is not very common. So, it is a wrong answer.

Option d is given as “all of the choices are correct”.

The splicing is not the regulatory mechanism and the regulation at the initiation of the translation occurs in some genes. So, it is a wrong answer.

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

Answer 14

Conclusion

The regulation of the gene takes place at the level of initiation of transcription mostly. This kind of regulation is the most studied. The regulation of the gene allows the differential expression of the proteins.