Bacterial cells are grown in 35S for a very short amount of time. What are the...
Bacterial cells are grown in 35S for a very short amount of time. What are the expected results?
a. no labeling
b. labeling on one side of origin
c. labeling on both sides of the origin
d. labeling only the origin
Homework Answers
a .no labelling take place due absence of sulphur group in the genetic material .it doesn't get incorporated into genetic metarial so no replication and labelling take place
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Bacterial cells are grown in 35S for a very short amount of
time. What are the...
Bacterial cells grown for many generations in a "heavy" isotope of nitrogen are shifted to a...
Bacterial cells grown for many generations in a "heavy" isotope of nitrogen are shifted to a "light" isotope of nitrogen. After three rounds of DNA replication, _______, _______, and ___________% of the DNA in the cells will have heavy, intermediate, and light density, respectively. a. 0, 50, 50 b. 50, 50, 0 c. 25, 25, 50 d. 50, 0, 50 e. 0, 25, 75
A Gram stain of unknown bacterium A grown for 24 hours show purple cells. Is bacterium...
A Gram stain of unknown bacterium A grown for 24 hours show purple cells. Is bacterium A Gram positive or Gram negative? A gram stain of bacterium A grown for 72 hours shows both purple and pink stained cells. Additional analysis shows that bacterium A is NOT contaminated. Explain these results. You are given 2 nutrient broth tubes each containing a pure culture of one of two Gram positive bacteria. Unfortunately, the labels have washed off and you are asked...
In reproductive cloning: on Select one: a stem cells are removed from the blastocyst and grown...
In reproductive cloning: on Select one: a stem cells are removed from the blastocyst and grown in a petri dish to form new tissue b. a blastocyst is inserted in the uterus of a surrogate c. both gametic and zygotic imprinting occur naturally d. all of the above
Doubling time refers to the amount of time required for a population of cells to double...
Doubling time refers to the amount of time required for a population of cells to double in A. Number. B. Virulence. C. Size. D. Carinogeneity. Fever is common in A. Viral exanthems. B. Folliculitis. C. Impetigo. D. Pityriasis rosea. Erythema multiforme A. Is characterized by target lesions on the extremities. B. Rarely results from reactions to medications. C. Is a Type I hypersensitivity disorder. D. Usually involves the mucous membranes as well.
Bacterial cells typically have — while eukaryotic cells have — Select one: a. One linear chromosome;...
Bacterial cells typically have — while eukaryotic cells have — Select one: a. One linear chromosome; many circular chromosomes. O b. Two circular chromosomes; numerous circular chromosomes depending on the species. O c. A single circular chromosome; many linear chromosomes. O d. Several circular chromosomes; many linear chromosomes. Which of the following gives additional protection to some bacteria? Select one: O a. The capsule. O b. The nucleoid O c. The plasma membrane. O d. The cell wall. Chloroplasts Select...
1. What is a stem cell line? A. Stem Cells lined up in a row. B....
1. What is a stem cell line? A. Stem Cells lined up in a row. B. Stem Cells in the lineage. C. A population of Stem Cells grown by scientists. D. A Stem Cell broken down, with it's contents placed in a line. 2. What is an Adult Stem Cell? A. A cell extracted from mature tissue. B. A cell extracted only from children. C. A cell extracted only from adults. D. Both A and C. E. None of the...
Doubling time refers to the amount of time required for a population of cells to double...
Doubling time refers to the amount of time required for a population of cells to double in A. Number. B. Virulence. C. Size. D. Carinogeneity.
please help QUESTION 1 When transforming bacterial cells, a researcher is interested in generating bacteria that...
please help
QUESTION 1 When transforming bacterial cells, a researcher is interested in generating bacteria that exogenously express the gene that encodes GFP (green fluorescent protein). After transformation, she finds that no bacteria colonies grew on her selective media. Which of the following best explains the results of her transformation protocol? The concentration of the antibiotics in the selection media was too low, therefore no bacteria grew. Her bacterial cells were not competent so they took up excessive amounts of...
why is the correct answer is D? please simple and short explanation Number of live cells...
why is the correct answer is D? please simple and short
explanation
Number of live cells (log) tooted Time Refer to the figure above. Which of the following statements is CORRECT regarding the figure. Cells are actively growing only during the stage represented by B. B) No cells are reproducing during the stage represented by D. C) Cells are most susceptible to antibiotics during the stage represented by A.D) Cells are alive but not reproducing during the stage represented by...
What color would ine bacterial cells appear if the patient has tuberculosis? and capsule stains The...
What color would ine bacterial cells appear if the patient has tuberculosis? and capsule stains The only difference is that without heat you have to stain the smear with carbol fuschin for 10 1. What is chemically unique about the Mycobacterium genus that personal Note: Alternate cold method acid fast stain (Kinyoun) minutes My note: There is not only one difference. The counterstain here is brilliant green rather than methylene blue And to allow the carbol fuchsin to penetrate acid...
A Gram stain of unknown bacterium A grown for 24 hours show purple cells. Is bacterium A Gram positive or Gram negative? A gram stain of bacterium A grown for 72 hours shows both purple and pink stained cells. Additional analysis shows that bacterium A is NOT contaminated. Explain these results. You are given 2 nutrient broth tubes each containing a pure culture of one of two Gram positive bacteria. Unfortunately, the labels have washed off and you are asked...
In reproductive cloning: on Select one: a stem cells are removed from the blastocyst and grown in a petri dish to form new tissue b. a blastocyst is inserted in the uterus of a surrogate c. both gametic and zygotic imprinting occur naturally d. all of the above
Bacterial cells typically have — while eukaryotic cells have — Select one: a. One linear chromosome; many circular chromosomes. O b. Two circular chromosomes; numerous circular chromosomes depending on the species. O c. A single circular chromosome; many linear chromosomes. O d. Several circular chromosomes; many linear chromosomes. Which of the following gives additional protection to some bacteria? Select one: O a. The capsule. O b. The nucleoid O c. The plasma membrane. O d. The cell wall. Chloroplasts Select...
please help
QUESTION 1 When transforming bacterial cells, a researcher is interested in generating bacteria that exogenously express the gene that encodes GFP (green fluorescent protein). After transformation, she finds that no bacteria colonies grew on her selective media. Which of the following best explains the results of her transformation protocol? The concentration of the antibiotics in the selection media was too low, therefore no bacteria grew. Her bacterial cells were not competent so they took up excessive amounts of...
why is the correct answer is D? please simple and short
explanation
Number of live cells (log) tooted Time Refer to the figure above. Which of the following statements is CORRECT regarding the figure. Cells are actively growing only during the stage represented by B. B) No cells are reproducing during the stage represented by D. C) Cells are most susceptible to antibiotics during the stage represented by A.D) Cells are alive but not reproducing during the stage represented by...
What color would ine bacterial cells appear if the patient has tuberculosis? and capsule stains The only difference is that without heat you have to stain the smear with carbol fuschin for 10 1. What is chemically unique about the Mycobacterium genus that personal Note: Alternate cold method acid fast stain (Kinyoun) minutes My note: There is not only one difference. The counterstain here is brilliant green rather than methylene blue And to allow the carbol fuchsin to penetrate acid...
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