Streptomycin is an antibiotic, which is used in the treatment of tuberculosis. It is isolated from the bacteria Streptomyces griseus. Streptomycin ramosus is Gram negative bacteria which produced terramycin antibiotic which inhibit the growth of bacteria.
2004
Microbes in Human Welfare
259960
What triggers activation of protoxin to active Bt toxin of Bacillus thuringiensis in boll worm?
1 Moist surface of midgut
2 Alkaline $\mathrm{pH}$ of gut
3 Acidic $\mathrm{pH}$ of stomach
4 Body temperature
Explanation:
Bacterium B. thuringiensis forms some protein crystals. These crystals contain a toxic insecticidal protein. This toxin does not kill the bacterium because it exists as inactive protoxins in them. But, once an insect ingests, it is converted into an active form of toxin due to alkaline PH of the alimentary canal. The activated toxin binds to the surface of midgut epithelial cells and creates pores which causes cell swelling and lyses and finally cause the death of the insect.
NEET-2019
Microbes in Human Welfare
259961
Select the incorrect match.
1 Citric acid - Aspergillus niger
2 Streptokinase - Streptococcus
3 Butyric acid - Clostridium acetobutylicum
4 Cyclosporin-A-Monascus purpureus
Explanation:
Cyclosporin-A is a bioactive chemical which is used as immunosuppressive agent in organ transplantation. It is obtained from fungus Trichoderma polysporum. - Aspergillus niger is the most commonly used microbe for the commercial production of citric acid. - Clostridium acetobutylicum produces acetone and butyl alcohol from saccharide substrates. - Cyclosporin $\mathrm{A}$ is used as an immunosuppressive agent in organ transplantation. It is produced by the fungus Trichoderma polysporum.
AIIMS-2016
Microbes in Human Welfare
259962
Which of the following is not used as a biopesticide?
1 Bacillus thuringiensis
2 Xanthomonas compestris
3 Nuclear Polyhydrosis Virus (NPV)
4 Trichoderma harzianum
Explanation:
Xanthomonas compestris can cause plant diseases such as black rot of cabbage. Thus, this bacterium is not utilized as a biopesticide. - Bacillus thuringiensis is a soil bacteria used to control certain insect pests. These bacteria make unique protein that is toxic against some insects. - Trichoderma harzianum is a fungus used to treat plant diseases. These are free-living fungi that are very common in root ecosystem. These fungi are effective biocontrol agents of several plant pathogen. - Nuclear Polyhydrosis Virus (NPV) belongs to the sub-group baculoviruses are pathogens attack insect (moths and butterflies) and other arthropods.
Streptomycin is an antibiotic, which is used in the treatment of tuberculosis. It is isolated from the bacteria Streptomyces griseus. Streptomycin ramosus is Gram negative bacteria which produced terramycin antibiotic which inhibit the growth of bacteria.
2004
Microbes in Human Welfare
259960
What triggers activation of protoxin to active Bt toxin of Bacillus thuringiensis in boll worm?
1 Moist surface of midgut
2 Alkaline $\mathrm{pH}$ of gut
3 Acidic $\mathrm{pH}$ of stomach
4 Body temperature
Explanation:
Bacterium B. thuringiensis forms some protein crystals. These crystals contain a toxic insecticidal protein. This toxin does not kill the bacterium because it exists as inactive protoxins in them. But, once an insect ingests, it is converted into an active form of toxin due to alkaline PH of the alimentary canal. The activated toxin binds to the surface of midgut epithelial cells and creates pores which causes cell swelling and lyses and finally cause the death of the insect.
NEET-2019
Microbes in Human Welfare
259961
Select the incorrect match.
1 Citric acid - Aspergillus niger
2 Streptokinase - Streptococcus
3 Butyric acid - Clostridium acetobutylicum
4 Cyclosporin-A-Monascus purpureus
Explanation:
Cyclosporin-A is a bioactive chemical which is used as immunosuppressive agent in organ transplantation. It is obtained from fungus Trichoderma polysporum. - Aspergillus niger is the most commonly used microbe for the commercial production of citric acid. - Clostridium acetobutylicum produces acetone and butyl alcohol from saccharide substrates. - Cyclosporin $\mathrm{A}$ is used as an immunosuppressive agent in organ transplantation. It is produced by the fungus Trichoderma polysporum.
AIIMS-2016
Microbes in Human Welfare
259962
Which of the following is not used as a biopesticide?
1 Bacillus thuringiensis
2 Xanthomonas compestris
3 Nuclear Polyhydrosis Virus (NPV)
4 Trichoderma harzianum
Explanation:
Xanthomonas compestris can cause plant diseases such as black rot of cabbage. Thus, this bacterium is not utilized as a biopesticide. - Bacillus thuringiensis is a soil bacteria used to control certain insect pests. These bacteria make unique protein that is toxic against some insects. - Trichoderma harzianum is a fungus used to treat plant diseases. These are free-living fungi that are very common in root ecosystem. These fungi are effective biocontrol agents of several plant pathogen. - Nuclear Polyhydrosis Virus (NPV) belongs to the sub-group baculoviruses are pathogens attack insect (moths and butterflies) and other arthropods.
Streptomycin is an antibiotic, which is used in the treatment of tuberculosis. It is isolated from the bacteria Streptomyces griseus. Streptomycin ramosus is Gram negative bacteria which produced terramycin antibiotic which inhibit the growth of bacteria.
2004
Microbes in Human Welfare
259960
What triggers activation of protoxin to active Bt toxin of Bacillus thuringiensis in boll worm?
1 Moist surface of midgut
2 Alkaline $\mathrm{pH}$ of gut
3 Acidic $\mathrm{pH}$ of stomach
4 Body temperature
Explanation:
Bacterium B. thuringiensis forms some protein crystals. These crystals contain a toxic insecticidal protein. This toxin does not kill the bacterium because it exists as inactive protoxins in them. But, once an insect ingests, it is converted into an active form of toxin due to alkaline PH of the alimentary canal. The activated toxin binds to the surface of midgut epithelial cells and creates pores which causes cell swelling and lyses and finally cause the death of the insect.
NEET-2019
Microbes in Human Welfare
259961
Select the incorrect match.
1 Citric acid - Aspergillus niger
2 Streptokinase - Streptococcus
3 Butyric acid - Clostridium acetobutylicum
4 Cyclosporin-A-Monascus purpureus
Explanation:
Cyclosporin-A is a bioactive chemical which is used as immunosuppressive agent in organ transplantation. It is obtained from fungus Trichoderma polysporum. - Aspergillus niger is the most commonly used microbe for the commercial production of citric acid. - Clostridium acetobutylicum produces acetone and butyl alcohol from saccharide substrates. - Cyclosporin $\mathrm{A}$ is used as an immunosuppressive agent in organ transplantation. It is produced by the fungus Trichoderma polysporum.
AIIMS-2016
Microbes in Human Welfare
259962
Which of the following is not used as a biopesticide?
1 Bacillus thuringiensis
2 Xanthomonas compestris
3 Nuclear Polyhydrosis Virus (NPV)
4 Trichoderma harzianum
Explanation:
Xanthomonas compestris can cause plant diseases such as black rot of cabbage. Thus, this bacterium is not utilized as a biopesticide. - Bacillus thuringiensis is a soil bacteria used to control certain insect pests. These bacteria make unique protein that is toxic against some insects. - Trichoderma harzianum is a fungus used to treat plant diseases. These are free-living fungi that are very common in root ecosystem. These fungi are effective biocontrol agents of several plant pathogen. - Nuclear Polyhydrosis Virus (NPV) belongs to the sub-group baculoviruses are pathogens attack insect (moths and butterflies) and other arthropods.
NEET Test Series from KOTA - 10 Papers In MS WORD
WhatsApp Here
Microbes in Human Welfare
259957
Streptomycin is obtained from
1 Streptomyces griseus
2 S. aureofaciens
3 S. venezuelae
4 S. ramosus
Explanation:
Streptomycin is an antibiotic, which is used in the treatment of tuberculosis. It is isolated from the bacteria Streptomyces griseus. Streptomycin ramosus is Gram negative bacteria which produced terramycin antibiotic which inhibit the growth of bacteria.
2004
Microbes in Human Welfare
259960
What triggers activation of protoxin to active Bt toxin of Bacillus thuringiensis in boll worm?
1 Moist surface of midgut
2 Alkaline $\mathrm{pH}$ of gut
3 Acidic $\mathrm{pH}$ of stomach
4 Body temperature
Explanation:
Bacterium B. thuringiensis forms some protein crystals. These crystals contain a toxic insecticidal protein. This toxin does not kill the bacterium because it exists as inactive protoxins in them. But, once an insect ingests, it is converted into an active form of toxin due to alkaline PH of the alimentary canal. The activated toxin binds to the surface of midgut epithelial cells and creates pores which causes cell swelling and lyses and finally cause the death of the insect.
NEET-2019
Microbes in Human Welfare
259961
Select the incorrect match.
1 Citric acid - Aspergillus niger
2 Streptokinase - Streptococcus
3 Butyric acid - Clostridium acetobutylicum
4 Cyclosporin-A-Monascus purpureus
Explanation:
Cyclosporin-A is a bioactive chemical which is used as immunosuppressive agent in organ transplantation. It is obtained from fungus Trichoderma polysporum. - Aspergillus niger is the most commonly used microbe for the commercial production of citric acid. - Clostridium acetobutylicum produces acetone and butyl alcohol from saccharide substrates. - Cyclosporin $\mathrm{A}$ is used as an immunosuppressive agent in organ transplantation. It is produced by the fungus Trichoderma polysporum.
AIIMS-2016
Microbes in Human Welfare
259962
Which of the following is not used as a biopesticide?
1 Bacillus thuringiensis
2 Xanthomonas compestris
3 Nuclear Polyhydrosis Virus (NPV)
4 Trichoderma harzianum
Explanation:
Xanthomonas compestris can cause plant diseases such as black rot of cabbage. Thus, this bacterium is not utilized as a biopesticide. - Bacillus thuringiensis is a soil bacteria used to control certain insect pests. These bacteria make unique protein that is toxic against some insects. - Trichoderma harzianum is a fungus used to treat plant diseases. These are free-living fungi that are very common in root ecosystem. These fungi are effective biocontrol agents of several plant pathogen. - Nuclear Polyhydrosis Virus (NPV) belongs to the sub-group baculoviruses are pathogens attack insect (moths and butterflies) and other arthropods.
