Consider statements about diseases: 1. Cholera is caused by a bacterium. 2. AIDS is caused by a retrovirus. 3. Dengue is transmitted by Culex mosquito. Which are correct? MCQ with Answer and Explanation
Consider statements about diseases: 1. Cholera is caused by a bacterium. 2. AIDS is caused by a retrovirus. 3. Dengue is transmitted by Culex mosquito. Which are correct?
A. 1 and 3 only
B. 2 and 3 only
C. 1 and 2 only
D. 1, 2 and 3
Answer: Option C
Solution (By JKExamLibrary)
Cholera is a severe diarrheal disease caused by the bacterium Vibrio cholerae. AIDS is caused by the Human Immunodeficiency Virus (HIV), which is a retrovirus. Dengue fever is transmitted by the bite of an infected female Aedes aegypti mosquito, not Culex (which transmits filariasis and Japanese encephalitis). Thus, statements 1 and 2 are correct.
Explanation:
Rabies is a fatal viral disease affecting the nervous system, transmitted by the bite of infected animals (dogs, bats). Louis Pasteur developed the rabies vaccine.
Explanation:
Mitosis produces two genetically identical diploid daughter cells (clones) essential for growth, repair, and asexual reproduction. Meiosis involves pairing (synapsis) and crossing over during prophase I, and produces four genetically diverse haploid cells (gametes). The conservation of chromosome number and genetic identity is a hallmark of mitosis.
Explanation:
The liver is the primary organ for glycogenesis (storing glucose as glycogen) and glycogenolysis, maintaining blood glucose levels. Muscles store glycogen for local use. Pancreas regulates via hormones, kidneys excrete excess glucose.
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