Two identical copies formed by the replication of a single chromosomes
Answer: Infection occurs when the host is exposed to pathogens. virus uses the cell's metabolism, and replicates itself while destroying the cell or changing the cell's genetic makeup.
Explanation:
- A virus is a miniscule pocket of protein that contains genetic material.
- Viruses pose a considerable challenge to the body’s immune system because they hide inside cells.
- This makes it difficult for antibodies to reach them. Some special immune system cells, called T-lymphocytes, can recognise and kill cells containing viruses, since the surface of infected cells is changed when the virus begins to multiply.
- Many viruses, when released from infected cells, will be effectively knocked out by antibodies that have been produced in response to infection or previous immunisation.
- Antibiotics are useless against viral infections. So antiviral drugs work differently to antibiotics, by interfering with the viral enzymes instead.
Hence virus are the pathogen that use the cell's metabolism. And replicate itself while destroying the cell or changing the cell's genetic makeup. viruses are so simple that they use their host cells to perform their activities for them
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Answer: Mitosis
Explanation:
Mitosis is one of the two types of cell division alongside meiosis. All the cells in the body undergo mitosis except sex cells such as male sperm and female ova that undergoes meiosis during sexual reproduction.
Thus, since mitosis occur in body cells, most of the cells in humans are body by it.
Transcription is the first step, where a complementary strand of RNA is made,w which is modelled off the DNA.
This RNA called mRNA (messenger RNA) moves out of the nucleus to the ribosomes (sites of protein manufacture) where translation occurs. Translation is where amino acids are made to string together based off the code in the mRNA
Answer:
C
Explanation:
a <u>habitat</u> is where an organism lives,and their <u>niche</u> is their way of life in that place .
