Answer: B. by toxic chemicals (in smoke) or radiation that can damage the DNA in cells.
Explanation:
The carcinogens presents in cigerates covalently bind to DNA and form DNA adducts which results into miscoding (e.g., insertion of the wrong base) during replication of DNA and this genetic mutation causes uncontrolled cellular growth which causes cancer.
Ionising radiation including X-rays, radioactive particles, and gamma rays,can cause cancer by damaging DNA. high-energy radiation damages DNA and cause genetic mutation same as cigerates and causes cancer.
Both toxic chemicals (in smoke) or radiation damages DNA inthe cells which leads to cancer.
Hence, the correct option is B.
Answer:
It is the arrangement of nucleotide within the genes which differs among DNA structures of different species. Each gene contains several codons which is three nucleotide long
The medicare part B involves coverage for immunization, Seasonal flu, seasonal H1N1 flu, pneumococcal vaccine and Hepatitis B.
<u>Explanation:</u>
Medicare is a popular insurance coverage for elderly Americans that operates in 4 different modules the part A covers for inpatient expenses , part B covers outpatient expenses, the part C covers alternate medications and the part D covers medicine purchase for part C. All the coverage consists only commercially available vaccines. So the above given vaccines covers in the section of part B of Medicare.
