The type of muscle found in the walls of the digestive tract is:
A. Skeletal
B. Smooth
C. Cardiac
D. Voluntary
Answer: Option B
Solution (By JKSSB Mock Tests)
Smooth muscle is non-striated, involuntary, and forms the muscular layer of the digestive tract (esophagus, stomach, intestines), responsible for peristalsis. Skeletal muscle is voluntary and striated, cardiac is heart-specific.
Explanation:
Alexander Fleming noticed in 1928 that a mold contaminant (Penicillium notatum) on a bacterial culture plate inhibited the growth of Staphylococcus aureus, leading to the discovery of penicillin, the first widely used antibiotic. Florey and Chain later purified it. Pasteur developed pasteurization.
Explanation:
Growth in living organisms occurs from inside the body through cell division and synthesis of new cellular material. In contrast, non-living things grow by the accumulation of material on their surface externally. Living growth is intrinsic and irreversible, whereas non-living growth is extrinsic and can be reversed.
Explanation:
Glycolysis is a cytoplasmic pathway that converts glucose into two pyruvate molecules, producing a net of 2 ATP and 2 NADH. Krebs cycle and ETC are in mitochondria.
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