Homework Answers
ANS 1:-DNA( Deoxyribonucleic acid)
The longer the exposure to UV radiation, the more thymine dimers are formed in the DNA and the greater the risk of an incorrect repair or a "missed" dimer. If cellular processes are disrupted because of an incorrect repair or remaining damage, the cell cannot carry out its normal functions. At this point, there are two possibilities, depending on the extent and location of the damage.
(1)If the damage is not too extensive, cancerous or precancerous cells are created from healthy cells.
(2)If it is widespread, the cell will die.
ANS 2:-Yes,because UV radiadtion cause many eye and skin related problems.
ANS 3:-(b)Bacillus subtilis.
ANS 4:-More resistant
Add Answer to:
1. What component of a bacterial cell is injured by UV radiation? a. Cell wall b....
In Experiment 1, why is exposure to UV radiation an effective method of controlling bacterial growth?...
In Experiment 1, why is exposure to UV radiation an effective method of controlling bacterial growth? A. It damages DNA, inhibiting transcription and replication. B. It causes the cell membrane to rupture. C. It creates ions that damage biomolecules. D. It raises the temperature, killing temperature sensitive bacteria.
ne contains pigments for B. Glycocalyx C. Chromatophores D. Teichoic acids E. Fimbriae F. Nucleoid G....
ne contains pigments for B. Glycocalyx C. Chromatophores D. Teichoic acids E. Fimbriae F. Nucleoid G. NAA H. Flagellin I. P lasmids J. Phospholipids K. Ribosomes L. Endospores M. NAM photosynthetic bacteria found in plasma membrane 2. found in gram-positive cell wall sticky carbohydrate outside cell wall used for attachment and avoiding phagocytes 4 numerous, short hair-like appendages that help bacterial cells attach to other cells. 5, , specialized structures assist in transfer of genetic material between cells 6 structure...
Bacterial cells, such as E. coli, are surrounded by a fluid plasma membrane and enclosed by...
Bacterial cells, such as E. coli, are surrounded by a fluid plasma membrane and enclosed by a rigid cell wall that protects the cell from damage. You will recall that there is no nuclear envelope in prokaryotic cells, but rather a “nucleoid region” with a single chromosome that is continuous (circular), not linear, as in eukaryotes. All of the genes required for basic survival and reproduction are found in the main chromosome. In addition to the main chromosomes, some DNA...
Please complete all questions (1-5). For question 5, construct a x-y scatter plot graph with UV...
Please complete all questions (1-5). For question 5, construct
a x-y scatter plot graph with UV exposure time on x-axis and amount
of growth (0,1,2,3) on Y axis. use a different color or symbol per
organism and DO NOT connect the dots. Thank you!
answer questions 1-4 please.
2-12 The Effect of Ultraviolet Radiation on Microbial Growth OBSERVATIONS AND INTERPRETATIONS 1 Enter your class data in the table below using the following descriptions: 0 - no growth 1 individual colonies...
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...
Which scientist / experiment provided the most compelling evidence to disproved Aristotle's theory of Spontaneous generation?...
Which scientist / experiment provided the most compelling evidence to disproved Aristotle's theory of Spontaneous generation? 1) Pasteur's swan neck experiment 2) Lazzaro's mutton broth experiment 3) Redi's flask and meat experiment 4) Pasteur's flask and meat experiment Antibiotic resistance genes may be transferred from one bacteria to another by conjugation via.... 1) the sex pilus 2) porins 3) chemotaxis 4) gas vacuoles Which of the following is not true of Gram-positive bacteria? 1) Posess an outer membrane composed of...
please answer ASAP 1) Which of the following is not a common bacterial shape? A) spirochote...
please answer ASAP
1) Which of the following is not a common bacterial shape? A) spirochote B.COCCIES Cdise Dj bacillas 2) The shape of a bacterial cell is determined and maintained by the A) cell membrane B) cell wall C) capsule D) slime laver 3) Which bacterial genus normally lacks a cell wall? A) Mycobacterium B) Streptococcus C) Mycoplasma D) Bacillus 4) Cell membranes are composed primarily of A) phospholipids and sugars B) teicoic acid and proteins C) phospholipids and...
1. Fill in the table above with what you observe on your plates. 2. Bacterial transformation...
1. Fill in the table above with what you observe on your
plates.
2. Bacterial transformation occurred on which agar plate (s)?
What evidence do you have that the bacteria were transformed
here?
3. Which plates have glowing growth? Explain what causes
bacteria to glow.
II. Transformation of E. coli with Plasmid DNA (PGLO) 1. Three LB (Luria Broth) agar plates are obtained. The plates contain: • Plate A: LB-Agar/Ampicillin/Arabinose • Plate B: LB-Agar/Ampicillin • Plate C: LB-Agar 2. Three...
please answer all 6. If you observe rod-shaped, pink cells on a slide that had just...
please answer all
6. If you observe rod-shaped, pink cells on a slide that had just been Gram stained, you can assume that the cell carries: Select one: a. Exotoxin. b. Endotoxin c. An endospore. d. Membrane lipid rafts. e. Sterols 7. The enzyme that is found in tears and saliva, can hydrolyze the peptide bonds cross-linking in the glycan chains of peptidoglycan. Select one: a. Nuclease b. Lysozyme c. Lysosome d. Penicillinase e. Peptidase 8. Plasmids in bacteria are:...
"Three organisms were innoculated on a culture media. Results showed Escherichia coli as red colonies, no...
"Three organisms were innoculated on a culture media. Results showed Escherichia coli as red colonies, no growth of Staphylococcus epidermidis, and colorless colonies of Salmonella enterica. The medium is:" a selective and differential b differential c selective d minimal e heterotrophic "A bacterium was incubated with aeration in a nutrient medium containing two carbon sources. After logarithmic growth, a lag phase was observed for 25 minutes. Then logarithmic growth at a slower rate was observed. Which substate was preferred by...
In Experiment 1, why is exposure to UV radiation an effective method of controlling bacterial growth? A. It damages DNA, inhibiting transcription and replication. B. It causes the cell membrane to rupture. C. It creates ions that damage biomolecules. D. It raises the temperature, killing temperature sensitive bacteria.
ne contains pigments for B. Glycocalyx C. Chromatophores D. Teichoic acids E. Fimbriae F. Nucleoid G. NAA H. Flagellin I. P lasmids J. Phospholipids K. Ribosomes L. Endospores M. NAM photosynthetic bacteria found in plasma membrane 2. found in gram-positive cell wall sticky carbohydrate outside cell wall used for attachment and avoiding phagocytes 4 numerous, short hair-like appendages that help bacterial cells attach to other cells. 5, , specialized structures assist in transfer of genetic material between cells 6 structure...
Bacterial cells, such as E. coli, are surrounded by a fluid plasma membrane and enclosed by a rigid cell wall that protects the cell from damage. You will recall that there is no nuclear envelope in prokaryotic cells, but rather a “nucleoid region” with a single chromosome that is continuous (circular), not linear, as in eukaryotes. All of the genes required for basic survival and reproduction are found in the main chromosome. In addition to the main chromosomes, some DNA...
Please complete all questions (1-5). For question 5, construct
a x-y scatter plot graph with UV exposure time on x-axis and amount
of growth (0,1,2,3) on Y axis. use a different color or symbol per
organism and DO NOT connect the dots. Thank you!
answer questions 1-4 please.
2-12 The Effect of Ultraviolet Radiation on Microbial Growth OBSERVATIONS AND INTERPRETATIONS 1 Enter your class data in the table below using the following descriptions: 0 - no growth 1 individual colonies...
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...
please answer ASAP
1) Which of the following is not a common bacterial shape? A) spirochote B.COCCIES Cdise Dj bacillas 2) The shape of a bacterial cell is determined and maintained by the A) cell membrane B) cell wall C) capsule D) slime laver 3) Which bacterial genus normally lacks a cell wall? A) Mycobacterium B) Streptococcus C) Mycoplasma D) Bacillus 4) Cell membranes are composed primarily of A) phospholipids and sugars B) teicoic acid and proteins C) phospholipids and...
1. Fill in the table above with what you observe on your
plates.
2. Bacterial transformation occurred on which agar plate (s)?
What evidence do you have that the bacteria were transformed
here?
3. Which plates have glowing growth? Explain what causes
bacteria to glow.
II. Transformation of E. coli with Plasmid DNA (PGLO) 1. Three LB (Luria Broth) agar plates are obtained. The plates contain: • Plate A: LB-Agar/Ampicillin/Arabinose • Plate B: LB-Agar/Ampicillin • Plate C: LB-Agar 2. Three...
please answer all
6. If you observe rod-shaped, pink cells on a slide that had just been Gram stained, you can assume that the cell carries: Select one: a. Exotoxin. b. Endotoxin c. An endospore. d. Membrane lipid rafts. e. Sterols 7. The enzyme that is found in tears and saliva, can hydrolyze the peptide bonds cross-linking in the glycan chains of peptidoglycan. Select one: a. Nuclease b. Lysozyme c. Lysosome d. Penicillinase e. Peptidase 8. Plasmids in bacteria are:...
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