The enzyme that catalyzes the synthesis of RNA from a DNA template is:
A. Ligase
B. Helicase
C. RNA polymerase
D. DNA polymerase
Answer: Option C
Solution (By JKExamLibrary)
RNA polymerase binds to the promoter region of DNA and synthesizes a complementary RNA strand during transcription. DNA polymerase synthesizes DNA, ligase joins DNA fragments, helicase unwinds DNA.
Explanation:
Ion exchange chromatography separates proteins based on their net surface charge; positively charged proteins bind to cation exchangers, negatively to anion exchangers. Gel filtration separates by size, affinity by specific binding, SDS-PAGE by molecular weight.
Explanation:
The Cell Theory was proposed by Matthias Schleiden (1838) and Theodor Schwann (1839). Schleiden concluded that all plants are composed of cells, while Schwann extended this to animals, stating that all living organisms are composed of cells and their products. Rudolf Virchow later added that all cells arise from pre-existing cells.
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