Answer:
B. Nucleic acids absorb UV light maximally at wavelengths of 254 to 260. Proteins absorb UV maximally at 200 nm. Using this phenomenon, one can to determine the presence and concentration of nucleic acids in a mixture.
Explanation:
The concentration of a solution of nucleic acid can be determined by measuring the absorbance at 260 nm, using a spectrophotometer. An A260 of 1.0 is equivalent to a concentration of 50 μg/mL for double-stranded DNA, or 40 μg/mL for single-stranded DNA or RNA. If the A280 is also determined, the A260/A280 ratio indicates if there are contaminants present, such as residual phenol or protein. <u>The A260/A280 ratio should be around 1.8 for pure DNA and 2.0 for pure RNA preparations.</u>
Answer:
if a patient believes something will reduce their pain, they will experience some relief.
Explanation:
Acupuncture was already considered an esoteric technique, since it was based on a little deep knowledge, where the patient's conviction that his pain would be diminished provided a relief from the inconvenience, but acupuncture was recognized by the World Health Organization (WHO) as a and was also listed as a UNESCO World Heritage Site.
Answer: C) Provides the instructions for making proteins
DNA stands for Deoxyribonucleic acid, it carries hereditary information which is being transferred from one generation to another generation.
DNA is important for the protein productions, metabolism, regulation and reproduction of cell. The cell encode for particular protein by following three steps called as replication, transcription and translation.
There are two types of alveolar cells. The type I alveolar cells which lines the alveoli and much more abundant than type II alveolar cells. Then the type II alveolar cells lesser in number but functions differently than type I alveolar cells. Type II alveolar cells secrete surfactant (composed of lecitin and sphingomyelin) for the lungs. Surfactant reduces the surface tension inside the alveoli, preventing alveolar consolidation. This is important as babies with dysfunctional type II alveolar cells (usually preterm babies less than 32 weeks age of gestation) will have respiratory distress syndrome in the absence of surfactant.
