258357
Which of the following processes was discovered by Lederberg and Tatum (1946)?
1 Transduction
2 Transformation
3 Asexual reproduction
4 Conjugation
Explanation:
Conjugation - Discovered by Lederberg and Tatum 1946 in E. coli bacterium - Transduction- Discover by Zinder and Lederberg (1952) in Salmonella typhi bacterium. - Transformation- Discovered by Griffith (1928) in Diplococcus pneumonia and detailed work out by MacLeod and McCarty.
WB JEE-2014
Biological Classification
258362
The mode of asexual reproduction in bacteria are
1 1,2 and 3 are correct
2 1 and 2 are correct
3 2 and 4 are correct
4 1 and 3 are correct
Explanation:
Asexual reproduction in bacteria following types- By Endospore- It forms during unfavorable condition, it is single form resistant against antibiotics high temperature, chemicals and radiation. (ii) By Zoospore - Motile spores are formed in rhizobium bacteria but rare in other bacteria . (iii) By Conidia- In filamentous bacteria sexual reproduction occurs by conidia as Streptomyces.
BHU PMT (Mains)-2007
Biological Classification
258364
Which of the following is not characteristic of gram positive bacteria?
1 Cell wall is smooth
2 Mesosomes are distinctive prominent
3 Basal body of flagellum contains two rings
4 Murein content of cell wall is $70-80 \%$
Explanation:
Gram positive bacteria have basal body of flagellum contains two ring. It lack outer membrane layer which is found in Gram negative bacteria. Gram - positive bacteria are bacteria that give a positive result in the gram stain test. Most Gram- positive bacteria have a relatively thick continuous cell wall which is composed largely of peptidoglycan (also known as mucopeptide or murein)
BCECE-2012
Biological Classification
258373
Which of these components is/are not present in Gram-negative bacteria?
1 Teichoic acid
2 Pseudomurein
3 Lipopolysaccharide
4 Mycolic acid
Explanation:
Teichoic acid present in gram positive bacteria and join perpendicular to the NAG and NAM. - Teichoic acid bind the peptidoglycan layers, it is absent in Gram negative bacteria.
258357
Which of the following processes was discovered by Lederberg and Tatum (1946)?
1 Transduction
2 Transformation
3 Asexual reproduction
4 Conjugation
Explanation:
Conjugation - Discovered by Lederberg and Tatum 1946 in E. coli bacterium - Transduction- Discover by Zinder and Lederberg (1952) in Salmonella typhi bacterium. - Transformation- Discovered by Griffith (1928) in Diplococcus pneumonia and detailed work out by MacLeod and McCarty.
WB JEE-2014
Biological Classification
258362
The mode of asexual reproduction in bacteria are
1 1,2 and 3 are correct
2 1 and 2 are correct
3 2 and 4 are correct
4 1 and 3 are correct
Explanation:
Asexual reproduction in bacteria following types- By Endospore- It forms during unfavorable condition, it is single form resistant against antibiotics high temperature, chemicals and radiation. (ii) By Zoospore - Motile spores are formed in rhizobium bacteria but rare in other bacteria . (iii) By Conidia- In filamentous bacteria sexual reproduction occurs by conidia as Streptomyces.
BHU PMT (Mains)-2007
Biological Classification
258364
Which of the following is not characteristic of gram positive bacteria?
1 Cell wall is smooth
2 Mesosomes are distinctive prominent
3 Basal body of flagellum contains two rings
4 Murein content of cell wall is $70-80 \%$
Explanation:
Gram positive bacteria have basal body of flagellum contains two ring. It lack outer membrane layer which is found in Gram negative bacteria. Gram - positive bacteria are bacteria that give a positive result in the gram stain test. Most Gram- positive bacteria have a relatively thick continuous cell wall which is composed largely of peptidoglycan (also known as mucopeptide or murein)
BCECE-2012
Biological Classification
258373
Which of these components is/are not present in Gram-negative bacteria?
1 Teichoic acid
2 Pseudomurein
3 Lipopolysaccharide
4 Mycolic acid
Explanation:
Teichoic acid present in gram positive bacteria and join perpendicular to the NAG and NAM. - Teichoic acid bind the peptidoglycan layers, it is absent in Gram negative bacteria.
258357
Which of the following processes was discovered by Lederberg and Tatum (1946)?
1 Transduction
2 Transformation
3 Asexual reproduction
4 Conjugation
Explanation:
Conjugation - Discovered by Lederberg and Tatum 1946 in E. coli bacterium - Transduction- Discover by Zinder and Lederberg (1952) in Salmonella typhi bacterium. - Transformation- Discovered by Griffith (1928) in Diplococcus pneumonia and detailed work out by MacLeod and McCarty.
WB JEE-2014
Biological Classification
258362
The mode of asexual reproduction in bacteria are
1 1,2 and 3 are correct
2 1 and 2 are correct
3 2 and 4 are correct
4 1 and 3 are correct
Explanation:
Asexual reproduction in bacteria following types- By Endospore- It forms during unfavorable condition, it is single form resistant against antibiotics high temperature, chemicals and radiation. (ii) By Zoospore - Motile spores are formed in rhizobium bacteria but rare in other bacteria . (iii) By Conidia- In filamentous bacteria sexual reproduction occurs by conidia as Streptomyces.
BHU PMT (Mains)-2007
Biological Classification
258364
Which of the following is not characteristic of gram positive bacteria?
1 Cell wall is smooth
2 Mesosomes are distinctive prominent
3 Basal body of flagellum contains two rings
4 Murein content of cell wall is $70-80 \%$
Explanation:
Gram positive bacteria have basal body of flagellum contains two ring. It lack outer membrane layer which is found in Gram negative bacteria. Gram - positive bacteria are bacteria that give a positive result in the gram stain test. Most Gram- positive bacteria have a relatively thick continuous cell wall which is composed largely of peptidoglycan (also known as mucopeptide or murein)
BCECE-2012
Biological Classification
258373
Which of these components is/are not present in Gram-negative bacteria?
1 Teichoic acid
2 Pseudomurein
3 Lipopolysaccharide
4 Mycolic acid
Explanation:
Teichoic acid present in gram positive bacteria and join perpendicular to the NAG and NAM. - Teichoic acid bind the peptidoglycan layers, it is absent in Gram negative bacteria.
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Biological Classification
258357
Which of the following processes was discovered by Lederberg and Tatum (1946)?
1 Transduction
2 Transformation
3 Asexual reproduction
4 Conjugation
Explanation:
Conjugation - Discovered by Lederberg and Tatum 1946 in E. coli bacterium - Transduction- Discover by Zinder and Lederberg (1952) in Salmonella typhi bacterium. - Transformation- Discovered by Griffith (1928) in Diplococcus pneumonia and detailed work out by MacLeod and McCarty.
WB JEE-2014
Biological Classification
258362
The mode of asexual reproduction in bacteria are
1 1,2 and 3 are correct
2 1 and 2 are correct
3 2 and 4 are correct
4 1 and 3 are correct
Explanation:
Asexual reproduction in bacteria following types- By Endospore- It forms during unfavorable condition, it is single form resistant against antibiotics high temperature, chemicals and radiation. (ii) By Zoospore - Motile spores are formed in rhizobium bacteria but rare in other bacteria . (iii) By Conidia- In filamentous bacteria sexual reproduction occurs by conidia as Streptomyces.
BHU PMT (Mains)-2007
Biological Classification
258364
Which of the following is not characteristic of gram positive bacteria?
1 Cell wall is smooth
2 Mesosomes are distinctive prominent
3 Basal body of flagellum contains two rings
4 Murein content of cell wall is $70-80 \%$
Explanation:
Gram positive bacteria have basal body of flagellum contains two ring. It lack outer membrane layer which is found in Gram negative bacteria. Gram - positive bacteria are bacteria that give a positive result in the gram stain test. Most Gram- positive bacteria have a relatively thick continuous cell wall which is composed largely of peptidoglycan (also known as mucopeptide or murein)
BCECE-2012
Biological Classification
258373
Which of these components is/are not present in Gram-negative bacteria?
1 Teichoic acid
2 Pseudomurein
3 Lipopolysaccharide
4 Mycolic acid
Explanation:
Teichoic acid present in gram positive bacteria and join perpendicular to the NAG and NAM. - Teichoic acid bind the peptidoglycan layers, it is absent in Gram negative bacteria.
