Exam 4: Molecular Biology

Explore all topics

The following is the sequence of bases in the sense strand of a DNA segment and contains the beginning of a gene. DNA 3' A T A T T A C C A G G C A T G G A C C C C C G G G 5' Based on this sequence,write the sequence of the anti-sense DNA strand and the mRNA.Label the 5' and 3' ends in your predicted sequences.The start codon in this organism is AUG.Indicate where the start codon is in your sequence.Why is the start codon important? Why does there have to be a specific start codon?

(Essay)

4.8/5

(78)

Question 61

tRNA is released from the ribosome at the ________ site.

(Multiple Choice)

4.7/5

(63)

Question 62

You experimentally change the DNA sequence directly upstream of a start codon of an operon in E.coli to investigate the function of this region of DNA.Analysis reveals that after the change the same amount of mRNA is made from the operon,but there are very few proteins made from the operon.What is the most likely function of the DNA sequence that you changed?

(Multiple Choice)

4.8/5

(75)

Question 63

Which of the following is an example of one codon?

(Multiple Choice)

4.8/5

(83)

Question 64

Genes that encoded for polymerases,gyrases,ribosomal proteins,and other proteins essential to replication,transcription,and translation are present on

(Multiple Choice)

4.9/5

(85)

Question 65

DNA participates in protein synthesis through

(Multiple Choice)

4.9/5

(78)

Question 66

Supercoiling is important for DNA structure,because

(Multiple Choice)

5.0/5

(84)

Question 67

In several ribosomes can simultaneously translate a single mRNA molecule in a complex called a(n).

(Multiple Choice)

4.9/5

(87)

Question 68

Which of the following statements is TRUE concerning mRNA?

(Multiple Choice)

4.9/5

(74)

Question 69

Transposable elements are

(Multiple Choice)

4.9/5

(87)

Question 70

The functional unit of genetic information is the

(Multiple Choice)

4.9/5

(82)

Question 71

Transfer RNA molecules

(Multiple Choice)

4.8/5

(62)

Question 72

DNA replication is bidirectional in prokaryotes with circular chromosomes.

(True/False)

4.9/5

(72)

Question 73

Polycistronic transcription units are common in

(Multiple Choice)

4.8/5

(90)

Question 74

Proteins known as chaperones are found only in Bacteria.

(True/False)

4.9/5

(70)

Question 75

Most prokaryotic genomes are double-stranded circular DNA.

(True/False)

4.8/5

(78)

Question 76

Termination of RNA synthesis is ultimately determined by

(Multiple Choice)

4.8/5

(85)

Question 77

Explain the difference between an intrinsic terminator and a Rho-dependent termination site.

(Essay)

4.9/5

(77)

Question 78

rRNA has an enzymatic role in all stages of protein synthesis.

(True/False)

4.8/5

(78)

Question 79

Speculate why the half-life of mRNA is short,while the half-lives of rRNA and tRNA are long.

(Essay)

4.9/5

(78)

Question 80

Showing 61 - 80 of 81

Exam 4: Molecular Biology

tRNA is released from the ribosome at the ________ site.

Which of the following is an example of one codon?

Genes that encoded for polymerases,gyrases,ribosomal proteins,and other proteins essential to replication,transcription,and translation are present on

DNA participates in protein synthesis through

Supercoiling is important for DNA structure,because

In ________ several ribosomes can simultaneously translate a single mRNA molecule in a complex called a(n)________.

Which of the following statements is TRUE concerning mRNA?

Transposable elements are

The functional unit of genetic information is the

Transfer RNA molecules

DNA replication is bidirectional in prokaryotes with circular chromosomes.

Polycistronic transcription units are common in

Proteins known as chaperones are found only in Bacteria.

Most prokaryotic genomes are double-stranded circular DNA.

Termination of RNA synthesis is ultimately determined by

Explain the difference between an intrinsic terminator and a Rho-dependent termination site.

rRNA has an enzymatic role in all stages of protein synthesis.

Speculate why the half-life of mRNA is short,while the half-lives of rRNA and tRNA are long.

Microorganisms and Microbiology

Microbial Cell Structure and Function

Microbial Metabolism

Microbial Growth and Control

Microbial Genomics

Metabolic Regulation

Viruses and Virology

Viral Genomes and Diversity

Genetics of Bacteria and Archaea

Genetic Engineering and Biotechnology

Microbial Evolution and Systematics

Metabolic Diversity of Microorganisms

Functional Diversity of Bacteria

Diversity of Bacteria

Diversity of Archaea

Diversity of Eukaryotic Microorganisms

Methods in Microbial Ecology

Microbial Ecosystems

Nutrient Cycles

Microbiology of the Built Environment

Microbial Symbioses

Microbial Interactions With Humans

Immunity and Host Defense

Immune Mechanisms

Molecular Immunology

Diagnostic Microbiology

Epidemiology

Person-To-Person Bacterial and Viral Diseases

Vectorborne and Soilborne Bacterial and Viral Diseases

Water and Food As Vehicles of Bacterial Diseases

Eukaryotic Pathogens: Fungal and Parasitic Diseases

Filters

In several ribosomes can simultaneously translate a single mRNA molecule in a complex called a(n).