The enzyme Taq polymerase, used in PCR, is obtained from: MCQ with Answer and Explanation

Explanation:
Fibrous root systems consist of a dense network of thin, branching roots originating from the stem base, typical of monocots like grasses. Taproot system has a main central root (dicots). Adventitious roots arise from stems or leaves, prop roots are supportive. Fibrous roots are effective in preventing soil erosion.

Explanation:
Oxidative phosphorylation occurs on the inner mitochondrial membrane, where the electron transport chain creates a proton gradient, and ATP synthase uses this gradient to produce ATP. This is the major source of cellular energy. Nucleus stores DNA, Golgi processes proteins, ribosomes synthesize proteins.

Explanation:
Restriction endonucleases (restriction enzymes) recognize specific palindromic DNA sequences and cleave the phosphodiester bonds, producing sticky or blunt ends. They are essential tools for recombinant DNA technology. DNA polymerase synthesizes DNA, ligase joins fragments, helicase unwinds. Examples: EcoRI, HindIII. These enzymes are naturally present in bacteria as a defense against viruses.