The vitamin that prevents neural tube defects during fetal development is:
A. Vitamin B₁₂
B. Vitamin C
C. Folic acid (B₉)
D. Vitamin B₁
Answer: Option C
Solution (By JKExamLibrary)
Folic acid is crucial for DNA synthesis and cell division; deficiency during early pregnancy increases risk of neural tube defects like spina bifida. Supplementation is recommended. B₁ is for carbohydrate metabolism, B₁₂ for nerve function, C for collagen.
Explanation:
The common cold is a viral infectious disease of the upper respiratory tract. While many viruses can cause it, Rhinoviruses are the most common causative agents, responsible for 30-50% of cases. Coronaviruses and adenoviruses can also cause colds. Influenza virus causes the flu, which is a more severe respiratory illness.
Explanation:
DNA fingerprinting (DNA profiling) is a technique used to identify individuals based on their unique DNA patterns. It primarily relies on the analysis of Variable Number Tandem Repeats (VNTRs) or Short Tandem Repeats (STRs), which are highly polymorphic, non-coding, repetitive DNA sequences that vary greatly in length and number between individuals.
Explanation:
Sucrose (table sugar) is a disaccharide composed of glucose and fructose. Glucose and fructose are monosaccharides, glycogen is a polysaccharide. Other disaccharides include maltose and lactose.
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