(a) Explain Griffith’s series of exeeriments where he witnessed transformatio in bacteria he worked with.
(b) Name the scientists responsible for determining the biochemical nature I “transforming principle” in Griffith’s experiments. What did they prove ?
(a) Explain Griffith’s series of exeeriments where he witnessed transformatio in bacteria he worked with.
(b) Name the scientists responsible for determining the biochemical nature I “transforming principle” in Griffith’s experiments. What did they prove ?
(b) Name the scientists responsible for determining the biochemical nature I “transforming principle” in Griffith’s experiments. What did they prove ?
Text Solution
AI Generated Solution
### Step-by-Step Text Solution
#### (a) Explanation of Griffith’s Series of Experiments
1. **Background**: Frederick Griffith conducted experiments in 1928 using two strains of the bacterium *Streptococcus pneumoniae*: a virulent (disease-causing) strain and a non-virulent (harmless) strain.
2. **Experimental Setup**:
- Griffith injected mice with different combinations of these bacterial strains:
...
|
Topper's Solved these Questions
XII BOARDS
XII BOARD PREVIOUS YEAR PAPER ENGLISH|Exercise SECTION-A|45 VideosXII BOARDS
XII BOARD PREVIOUS YEAR PAPER ENGLISH|Exercise SECTION-B|81 VideosXII BOARDS
XII BOARD PREVIOUS YEAR PAPER ENGLISH|Exercise Delhi Board : Set III section -C|3 VideosSAMPLE PAPER 2019
XII BOARD PREVIOUS YEAR PAPER ENGLISH|Exercise Section E Part B|3 Videos
Similar Questions
Explore conceptually related problems
(a) Explain Griffith's series of experiments where he witnessed transformation in bacteria he worked with. (b) Name the scientists responsible for determining the biochemical nature of "transforming principle" in Griffith's experiments. What did they prove?
(a) Describe the various steps of Griffith's experiment that led to the conclusion of the 'Transforming Principle'. (b) How did the chemical nature of the 'Transforming Principle' get established ?
Knowledge Check
Assertion : In Griffith's experiment, a mixture of heat-killed virulent bacteria R and live non - virulent bacteria S, lead to the death of mice. Reason : 'Transforming principle' got transferred from heat -killed R strain and made it virulent.
Assertion : In Griffith's experiment, a mixture of heat-killed virulent bacteria R and live non - virulent bacteria S, lead to the death of mice. Reason : 'Transforming principle' got transferred from heat -killed R strain and made it virulent.
A
If both assertion and reason are true and reason is the correct explanation of assertion
B
If both assertion and reason are true but reason is not the correct explanation of assertion
C
If assertion is true but reason is false
D
if both assertion and reason are false.
Transforming the American West Through Food and Hospitality Just as travelers taking road trips today may need to take a break for food at a rest area along the highway, settlers traversing the American West by train in the mid-1800s often found 12 themselves in need of refreshment. However, food available on rail lines was generally of terrible quality. 13 Despite having worked for railroad companies, Fred Harvey, an English-born 14 entrepreneur. He decided to open his own restaurant business to serve rail customers. Beginning in the 1870s, he opened dozens of restaurants in rail stations and dining cars. These Harvey Houses, which constituted the first restaurant chain in the United States, 15 was unique for its high standards of service and quality. The menu was modeled after those of fine restaurants, so the food was leagues beyond the 16 sinister fare travelers were accustomed to receiving in transit. His restaurants were immediately successful, but Harvey was not content to follow conventional business practices. 17 Although women did not traditionally work in restaurants in the nineteenth century, Harvey decided to try employing women as waitstaff. In 1883, he placed an advertisement seeking educated, well-mannered, articulate young women between the ages of 18 and 30. 18 Response to the advertisement was overwhelming, even tremendous, and Harvey soon replaced the male servers at his restaurants with women. Those who were hired as “Harvey Girls” joined an elite group of workers, who were expected to complete a 30-day training program and follow a strict code of rules for conduct and curfews. In the workplace, the women donned identical black-and-white uniforms and carried out their duties with precision. Not only were such regulations meant to ensure the efficiency of the business and the safety of the workers, 19 but also helped to raise people’s generally low opinion of the restaurant industry In return for the servers’ work, the position paid quite well for the time: $17.50 a month, plus tips, meals, room and board, laundry service, and travel expenses. 20 For as long as Harvey Houses served rail travelers through the mid-twentieth century, working there was a steady and lucrative position for women. Living independently and demonstrating an intense work 21 ethic, the Harvey Girls became known as a transformative force in the American 22 West. Advancing the roles of women in the restaurant industry and the American workforce as a whole, the Harvey Girls raised the standards for restaurants and blazed a trail in the fast-changing landscape of the western territories. Which choice provides the most logical introduction to the sentence?
Transforming the American West Through Food and Hospitality Just as travelers taking road trips today may need to take a break for food at a rest area along the highway, settlers traversing the American West by train in the mid-1800s often found 12 themselves in need of refreshment. However, food available on rail lines was generally of terrible quality. 13 Despite having worked for railroad companies, Fred Harvey, an English-born 14 entrepreneur. He decided to open his own restaurant business to serve rail customers. Beginning in the 1870s, he opened dozens of restaurants in rail stations and dining cars. These Harvey Houses, which constituted the first restaurant chain in the United States, 15 was unique for its high standards of service and quality. The menu was modeled after those of fine restaurants, so the food was leagues beyond the 16 sinister fare travelers were accustomed to receiving in transit. His restaurants were immediately successful, but Harvey was not content to follow conventional business practices. 17 Although women did not traditionally work in restaurants in the nineteenth century, Harvey decided to try employing women as waitstaff. In 1883, he placed an advertisement seeking educated, well-mannered, articulate young women between the ages of 18 and 30. 18 Response to the advertisement was overwhelming, even tremendous, and Harvey soon replaced the male servers at his restaurants with women. Those who were hired as “Harvey Girls” joined an elite group of workers, who were expected to complete a 30-day training program and follow a strict code of rules for conduct and curfews. In the workplace, the women donned identical black-and-white uniforms and carried out their duties with precision. Not only were such regulations meant to ensure the efficiency of the business and the safety of the workers, 19 but also helped to raise people’s generally low opinion of the restaurant industry In return for the servers’ work, the position paid quite well for the time: $17.50 a month, plus tips, meals, room and board, laundry service, and travel expenses. 20 For as long as Harvey Houses served rail travelers through the mid-twentieth century, working there was a steady and lucrative position for women. Living independently and demonstrating an intense work 21 ethic, the Harvey Girls became known as a transformative force in the American 22 West. Advancing the roles of women in the restaurant industry and the American workforce as a whole, the Harvey Girls raised the standards for restaurants and blazed a trail in the fast-changing landscape of the western territories. Which choice provides the most logical introduction to the sentence?
A
NO CHANGE
B
He had lived in New York and New Orleans, so
C
To capitalize on the demand for good food,
D
DELETE the underlined portion.
Similar Questions
Explore conceptually related problems
(a) Describe the various steps of Griffith's experiment that led to the conclusion of the 'Transforming Principle'. (b) How did the chemical nature of the 'Transforming Principle' get established?
(a) Describe the various steps of Griffith's experiment that led to the conclusion of the 'Transforming Principle'. (b) How did the chemical nature of the 'Transforming Principle' get established ?
(a) Describe the various steps of Griffith's experiment that led to the conclusion of the 'Transforming Principle'. (b) How did the chemical nature of the 'Transforming Principle' get established ?
Answer the following questions based on Meselson and Stahl s experiment: (a) Write the name of the chemical substance used as a source of nitrogen in the experiment by them. (b) Why did the scientists synthesise the light and the heavy DNA molecules In the organism used in the experiment ? (c) How did the scientists make it possible to distinguish the heavy DNA molecule from the light DNA molecule ? Explain. ((1) Write the conclusion the scientists arrived at after completing the experiment.
Explain the experiment performed be Griffith on Streptococcus pneumonia. What did he conclude from this experiment? Name the three scientists who followed up Griffith's experiments. What did they conclude and how?
(a) state the central dogma as proposed by francis crick are there any exceptions to it ? Suppport your answer with a reason and an example (b) Explain how the biochemical chraterisation (nature) of Transforming pronciple was determined which was not defined from Griffith 's experiments