The biochemical test used to detect the presence of starch is:
A. Benedict's test
B. Sudan III test
C. Iodine test
D. Biuret test
Answer: Option C
Solution (By JKSSB Mock Tests)
Iodine solution (iodine in potassium iodide) gives a blue-black color with starch due to the formation of a polyiodide chain complex with amylose. Benedict's tests for reducing sugars, Biuret for proteins, Sudan III for lipids. The iodine test is specific and sensitive for starch.
Consider statements about the endoplasmic reticulum: 1. Rough ER has ribosomes attached. 2. Smooth ER synthesizes lipids. 3. Rough ER is involved in detoxification. Which are correct?
Explanation:
The rough endoplasmic reticulum (RER) has ribosomes attached to its cytoplasmic surface, making it appear rough, and is primarily involved in protein synthesis and modification. The smooth endoplasmic reticulum (SER) lacks ribosomes and is the major site for lipid synthesis and detoxification of drugs. Statement 3 is incorrect as detoxification is a function of SER.
Explanation:
Natural killer (NK) cells were discovered in the 1970s by Rolf Kiessling and others. They are part of innate immunity, killing virus-infected and tumor cells.
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