MCQ on Water, pH and Buffer Systems (Part-3)
(1). What is the molecular weight of water? a. 10 g/mol b. 15 g/mol c. 18 g/mol d. 20 g/mol (2). What is the H+ ion concentration in pure water? a. 1 X 10-7 m b. 1 X 107 … Read more
Biochemistry Tutorials
MCQ on Water (Part-2)
(1). Bond length between H and O atoms in water is: a. 0.00965 nm b. 0.0965 nm c. 0.965 nm d. 9.650 nm (2). The van der Waals radius of Oxygen atom in water molecule is a. 1.2 Å b. 1.4 Å c. 1.6 Å d. 1.8 Å Learn more: MCQ on pH | MCQ … Read more
Difference Between Gram Positive and Gram Negative Bacteria
Gram Positive vs Gram Negative Bacteria What is Grams staining? Christian Gram, a Danish Physician in 1884 developed a staining technique to distinguish two types of bacteria. The two categories of bacteria based on gram staining are Gram positive bacteria and Gram negative bacteria. Bacteria are first stained with crystal violet or gentian violet. All … Read more
Enzyme Regulation Mechanisms: The Molecular Methods to Regulate Enzymes and Enzymatic Acitvity
What are enzymes? Ø All living organisms in the world should possess TWO fundamental properties Ø They are: (1). Must be able to self-replicate (2). Must be able to catalyze chemical reactions efficiently and selectively Ø Enzymes are the molecules which enables each living entity to do these two … Read more
Nucleotide Excision Repair (NER) in Prokaryotes (DNA Repair Mechanism: Part IV)
What is Nucleotide Excision Repair (NER)? As the name suggests it is a type of DNA repair mechanism. In nucleotide excision repair or NER, the damaged base along with a short stretch of healthy strand is removed and later the gap is refilled with correct nucleotides. Thus the NER pathway operates by ‘cut and patch’ … Read more