The respiratory pigment hemocyanin contains which metal? MCQ with Answer and Explanation

Explanation:
Polymerase Chain Reaction (PCR) is a powerful technique used to exponentially amplify a specific segment of DNA using primers and a thermostable DNA polymerase. Gel electrophoresis is a method used to separate DNA, RNA, or protein molecules based on their size and charge by applying an electric field through a gel matrix. Restriction enzymes are molecular scissors that cut DNA at specific sequences; DNA ligase is the enzyme that joins DNA fragments together. Thus, statements 1 and 2 are correct.

Explanation:
Translation occurs at ribosomes, where tRNA anticodons recognize mRNA codons and add the corresponding amino acids to a growing polypeptide chain. Replication duplicates DNA, transcription synthesizes mRNA from DNA, translocation is movement of chromosomes or protein transport.

Explanation:
During metaphase, the nuclear envelope has completely disappeared, and the chromosomes, attached to spindle fibers at their kinetochores, are moved to the center of the cell. This alignment of chromosomes at the cell equator is called the metaphase plate. This stage is crucial for the equal distribution of genetic material to daughter cells.