What is the structural arrangement of microtubules in a centriole? MCQ with Answer and Explanation

Explanation:
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:
The spleen, located in the upper left abdomen, filters blood, removes senescent or damaged red blood cells, stores platelets and white blood cells, and mounts immune responses. The liver processes nutrients and toxins, kidneys filter blood to produce urine, pancreas secretes enzymes/hormones.

Explanation:
Cristae are the numerous infoldings of the inner mitochondrial membrane that increase surface area for oxidative phosphorylation and ATP synthesis. They contain ATP synthase complexes. Thylakoids are membrane structures in chloroplasts; grana are stacks of thylakoids. Cisternae are flattened membrane sacs of ER and Golgi. Cristae give the inner membrane its characteristic folded appearance.