The scientist who discovered the bacterium that causes anthrax was:
A. Joseph Lister
B. Edward Jenner
C. Robert Koch
D. Louis Pasteur
Answer: Option C
Solution (By JKExamLibrary)
Robert Koch identified Bacillus anthracis as the causative agent of anthrax in 1876, establishing Koch's postulates for proving microbial disease causation. Pasteur developed vaccines, Jenner smallpox vaccine, Lister antiseptic surgery.
Explanation:
Proteins are polymers of amino acids. The amino acids are linked together by peptide bonds, which are covalent bonds formed between the carboxyl group (-COOH) of one amino acid and the amino group (-NH2) of the next, with the release of a water molecule (dehydration synthesis). Glycosidic bonds link sugars, and phosphodiester bonds link nucleotides.
Explanation:
The right ventricle pumps deoxygenated blood through the pulmonary artery to the lungs for oxygenation. The pulmonary artery is the only artery carrying deoxygenated blood. Pulmonary veins carry oxygenated blood from lungs to the left atrium. The left atrium receives oxygenated blood, not deoxygenated. The right atrium receives deoxygenated blood from the body. Thus, C is correct.
Explanation:
Adventitious roots arise from non-root tissues like stems, leaves, or branches. Examples: prop roots of banyan, stilt roots of maize, aerial roots of orchids. Taproot and fibrous roots develop from the radicle.
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