Homework Answers
A. It damages DNA, inhibits transcription and replication.
These UV radiations causes damage in the structure of the DNA and causes problem during replication.
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In Experiment 1, why is exposure to UV radiation an effective method of controlling bacterial growth?...
and Lab Exer n this experiment you will evaluate effect of UV light on bacterial growth. UV light affects growth by interfering with DNA, resulting in thymine dimer formation. The dimerization...
and Lab Exer n this experiment you will evaluate effect of UV light on bacterial growth. UV light affects growth by interfering with DNA, resulting in thymine dimer formation. The dimerization is confined within adjacent thymine residues on same strand (intrastrand ). These dimmer lesions have consequence on DNA functions including interference in DNA replication, transcription etc, so UV exposure of cells can lead to lethal effects for bacterial multiplications. This forms the basis for UV method to control bacterial...
What is the effect of UV radiation on bacterial growth and how do things such as...
What is the effect of UV radiation on bacterial growth and how do things such as duration of exposure contribute to the growth patterns. Also, what is a possible experiment you could perform to re-confirm or validate your expectations?
1. What component of a bacterial cell is injured by UV radiation? a. Cell wall b....
1. What component of a bacterial cell is injured by UV radiation? a. Cell wall b. Plasma membrane c. Ribosomes d. DNA Answer 2. Should everyone be sure to protect their eyes and skin from UV radiation? a. Yes b. No Answer 3. Which of the bacteria we are using in this lab is an endospore former? a. E. coli b. Bacills (cereus or subtilis) Answer 4. What is the purpose of using a 24 hour culture and 7 day...
Question 48 1 pts Please select all the factors that would impact the effectiveness of an...
Question 48 1 pts Please select all the factors that would impact the effectiveness of an antimicrobial agent (such as bleach) at killing all the microbes on a surface: Duration (time) of exposure of the agent to the surface Concentration of Antimicrobial agent used on the surface Microbial characteristics of the microbes on the surface Number of microbes on the surface before treatment Characteristics and identity of the Antimicrobial agent used on the surface Environmental conditions of the surface (organic...
Page 6 of 8 4 Radiation is changed les energy to breaks DNA (Gamma DNA replication)...
Page 6 of 8 4 Radiation is changed les energy to breaks DNA (Gamma DNA replication) No r dian (UV creates pynimidine dimers that inhibit DNA replication Al the above None of the above Filtration is the physical removal of microbes by pening age or liquid through a fiber Tor F Chemical Agents in Microbial Control include Disinfectants, antiseptics, sterilants, degermees, and preservatives. Some desirable qualities of chemicals include modation in bw concentration brand pastrum s botiaily à all the...
LeyUUL CICILILED W H ILI AaBbccde ABBCODE AaBbCcDc AaBbccode Aa Heading 2 No Spacing Heading 1...
LeyUUL CICILILED W H ILI AaBbccde ABBCODE AaBbCcDc AaBbccode Aa Heading 2 No Spacing Heading 1 AAAA * ADA IAD 1) Common drugs originate from A) Natural products B) laboratory synthesis Chemical derivatives D) all of the above 2) A medicine is a drug that A) Provides a euphoric effect B) Is isolated from a plant C) Kills bacteria D) Has therapeutic properties 3) Which of the following would be an example of a synergistic effect? A) Aspirin reduces fever...
1. Describe the functions of the following reagents in extraction of DNA from corn meal: proteina...
1. Describe the functions of the following reagents in extraction of DNA from corn meal: proteinase K; guanidine HCI; SDS 2. Why is the ratio of the OD at 260 and 280 nm used to estimate DNA purity? 3. In one paragraph, summarize basic principles of PCR technique in your own words. List all the reagents you will need to perform a PCR experiment. Does this method tell you what genetic modifications were made? If yes, describe how you can...
1. Which of the following are the sites within the human body where carbon dioxide and...
1. Which of the following are the sites within the human body where carbon dioxide and oxygen are exchanged? A. Alveoli B. Arteries C. Synapses D. Venules 2. Which of the following describes the most important reason for repeating an experimental investigation? A. To verify the validity of the original findings B. To expand upon the original investigation C. To manipulate the independent variable D. To attempt to disprove the hypothesis 3. Lithium has an atomic number of 3 and...
explain 1 or 2 molecular details in how epigenetics may allow melanoma cells to outsmart BRAF inhibitors **This is for a genetics course Seope: This science commentary claims that epigeneties pl...
explain 1 or 2 molecular details in how epigenetics may allow
melanoma cells to outsmart BRAF inhibitors
**This is for a genetics course
Seope: This science commentary claims that epigeneties plays a role in cancer cells becoming therapy-resistant. The language used is generalized for the non-scientist and does not include any molecular details, such as methylation of a specific nucleotide in an allele or modification of a specific histone tail amino acid. Your task (individually or in a group of...
and Lab Exer n this experiment you will evaluate effect of UV light on bacterial growth. UV light affects growth by interfering with DNA, resulting in thymine dimer formation. The dimerization is confined within adjacent thymine residues on same strand (intrastrand ). These dimmer lesions have consequence on DNA functions including interference in DNA replication, transcription etc, so UV exposure of cells can lead to lethal effects for bacterial multiplications. This forms the basis for UV method to control bacterial...
1. What component of a bacterial cell is injured by UV radiation? a. Cell wall b. Plasma membrane c. Ribosomes d. DNA Answer 2. Should everyone be sure to protect their eyes and skin from UV radiation? a. Yes b. No Answer 3. Which of the bacteria we are using in this lab is an endospore former? a. E. coli b. Bacills (cereus or subtilis) Answer 4. What is the purpose of using a 24 hour culture and 7 day...
Question 48 1 pts Please select all the factors that would impact the effectiveness of an antimicrobial agent (such as bleach) at killing all the microbes on a surface: Duration (time) of exposure of the agent to the surface Concentration of Antimicrobial agent used on the surface Microbial characteristics of the microbes on the surface Number of microbes on the surface before treatment Characteristics and identity of the Antimicrobial agent used on the surface Environmental conditions of the surface (organic...
Page 6 of 8 4 Radiation is changed les energy to breaks DNA (Gamma DNA replication) No r dian (UV creates pynimidine dimers that inhibit DNA replication Al the above None of the above Filtration is the physical removal of microbes by pening age or liquid through a fiber Tor F Chemical Agents in Microbial Control include Disinfectants, antiseptics, sterilants, degermees, and preservatives. Some desirable qualities of chemicals include modation in bw concentration brand pastrum s botiaily à all the...
LeyUUL CICILILED W H ILI AaBbccde ABBCODE AaBbCcDc AaBbccode Aa Heading 2 No Spacing Heading 1 AAAA * ADA IAD 1) Common drugs originate from A) Natural products B) laboratory synthesis Chemical derivatives D) all of the above 2) A medicine is a drug that A) Provides a euphoric effect B) Is isolated from a plant C) Kills bacteria D) Has therapeutic properties 3) Which of the following would be an example of a synergistic effect? A) Aspirin reduces fever...
1. Describe the functions of the following reagents in extraction of DNA from corn meal: proteinase K; guanidine HCI; SDS 2. Why is the ratio of the OD at 260 and 280 nm used to estimate DNA purity? 3. In one paragraph, summarize basic principles of PCR technique in your own words. List all the reagents you will need to perform a PCR experiment. Does this method tell you what genetic modifications were made? If yes, describe how you can...
explain 1 or 2 molecular details in how epigenetics may allow
melanoma cells to outsmart BRAF inhibitors
**This is for a genetics course
Seope: This science commentary claims that epigeneties plays a role in cancer cells becoming therapy-resistant. The language used is generalized for the non-scientist and does not include any molecular details, such as methylation of a specific nucleotide in an allele or modification of a specific histone tail amino acid. Your task (individually or in a group of...
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