Metastasis is the process by which malignant cancer cells detach from the primary tumor, travel through the blood or lymph, and establish secondary tumors in other organs. Benign tumors do not metastasize. Apoptosis is programmed cell death.
Consider statements about the cytoskeleton: 1. Microtubules are made of tubulin. 2. Microfilaments are made of actin. 3. Intermediate filaments are made of cellulose. Which are correct?
Explanation:
The cytoskeleton provides structural support and is composed of three main types of filaments. Microtubules are hollow tubes made of the protein tubulin. Microfilaments are solid rods composed of actin. Intermediate filaments are made of various fibrous proteins like keratin, not cellulose, which is a plant cell wall component. Thus, statements 1 and 2 are correct.
Explanation:
SDS-PAGE (sodium dodecyl sulfate polyacrylamide gel electrophoresis) denatures proteins and coats them with negative charge, allowing separation by molecular weight in an electric field. PCR amplifies DNA, sequencing determines base order, ELISA detects antigens/antibodies. SDS-PAGE is a fundamental biochemistry technique.
No comments yet. Be the first to start the discussion!