The specific gravity of normal urine is approximately:
A. 1.015-1.030
B. 1.000
C. 1.050-1.100
D. 0.800-0.900
Answer: Option A
Solution (By JKSSB Mock Tests)
Urine specific gravity, a measure of solute concentration, normally ranges from 1.015 to 1.030. It varies with hydration status: low when dilute (after drinking), high when concentrated (dehydration). Diabetes insipidus shows low SG, diabetes mellitus may show high due to glucose.
Consider statements about angiosperms: 1. They have enclosed seeds. 2. They exhibit double fertilization. 3. All angiosperms are trees. Which are correct?
Explanation:
Angiosperms are flowering plants where seeds are enclosed within a mature ovary (fruit). They are characterized by double fertilization, where one male gamete fuses with the egg and the other with the secondary nucleus. They exhibit immense diversity in habit, ranging from tiny aquatic Wolffia to massive trees, so not all are trees. Statements 1 and 2 are correct.
Explanation:
Thiamine pyrophosphate (TPP) is a coenzyme for pyruvate dehydrogenase, alpha-ketoglutarate dehydrogenase, and transketolase, playing a key role in carbohydrate metabolism. Riboflavin is FAD, niacin NAD, pantothenic acid CoA.
Explanation:
Translation occurs at ribosomes, where tRNA anticodons recognize mRNA codons and add the corresponding amino acids to a growing polypeptide chain. Replication duplicates DNA, transcription synthesizes mRNA from DNA, translocation is movement of chromosomes or protein transport.
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