Question

what is a tumor? what are some characteristics of a cancer cell?
nucleotides are the monomers (building blocks) of nucleic acids. wha\tnucleotide?

Explanation:

1. Tumors result from unregulated cell division, forming a mass that may be benign (non-cancerous) or malignant (cancerous).
2. Cancer cells bypass normal growth controls: they divide without signals, avoid cell death, stimulate new blood vessel growth, spread to other tissues, and have damaged DNA.
3. Nucleotides are the basic units of DNA/RNA, with three core components: base (adenine, guanine, cytosine, thymine/uracil), sugar (deoxyribose/ribose), and phosphate.

Answer:

1. A tumor is an abnormal mass of tissue formed by uncontrolled cell growth.
2. Key characteristics of cancer cells include uncontrolled proliferation, evasion of apoptosis, angiogenesis induction, metastasis potential, and genomic instability.
3. A nucleotide is a molecule consisting of a nitrogenous base, a pentose sugar, and a phosphate group.