Which of the following microorganisms is used for the production of citric acid in the industry? MCQ with Answer and Explanation

Explanation:
Stanley Miller and Harold Urey (1953) simulated primitive Earth conditions by mixing methane, ammonia, hydrogen, and water vapor and providing electric discharge (simulating lightning). They obtained amino acids (glycine, alanine, etc.), supporting the chemical origin of life hypothesis. It didn't produce proteins, DNA, or lipids directly. This experiment was crucial for abiogenesis theories.

Explanation:
Genes are specific sequences of nucleotides that serve as the fundamental units of heredity, and in all cellular organisms, they are made of DNA (deoxyribonucleic acid). Chromosomes are thread-like structures composed of DNA and proteins, and they are located within the nucleus of eukaryotic cells. DNA is the genetic material in all cellular organisms; RNA serves as the genetic material only in some viruses, not in cells. Thus, statements 1 and 2 are correct.

Explanation:
The aorta receives blood directly from the left ventricle under high pressure (systolic ~120 mmHg). Pressure decreases as blood moves through arteries, capillaries, and veins. Vena cava pressure is near zero.