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tekilochka [14]
3 years ago
7

Cancers may be either inherited or they may be induced by environmental factors such as carcinogens and radiation. Select the st

atement that explains how diverse factors such as hereditary events and environmental agents can both cause cancer.
1. Environmental agents cause cancer only in individuals with inherited mutations.
2. Cell division is inhibited by both hereditary and environmental factors.
3. Hereditary and environmental factors involve mutations that affect the cell cycle.
4. Environmental factors induce mutations only in genes that regulate the cell cycle.
5. Both hereditary and environmental factors decrease the rate of mutations.
Biology
1 answer:
fomenos3 years ago
8 0

Answer:

Option (2) and (3).

Explanation:

Cancer is the uncontrolled division of the cell that might results in the loss of apoptosis in the cells. The cancer cell shows the property like angiogenesis and loss of contact inhibition.

Both the hereditary factors like mutations in some gene and environmental factors like any mutagen may inhibit the process of the cell division. Both these factors mainly inhibits the gene that are responsible for the regulation of the cell cycle like p53, Rb.

Thus, the correct answer is option (2) and (3).

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When two genes from two different people are sequenced and aligned, it is discovered that there are multiple sequence difference
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Answer:

The mutations lie at locations where they don't affect protein sequence due to degeneracy of the genetic code.

Explanation:

Genetic code is the set of the triplet codons each of which code for a specific amino acid. The nucleotide sequence of mRNA is read in the form of triplets during the process of protein synthesis and the respective amino acid is added to the growing polypeptide chain. The genetic code is degenerate. This means that more than one triplet code specifies one amino acid and some amino acids are encoded by more than one codon.

For instance, genetic codes CUU, CUC, CUA, CUG specify amino acid "leucine". Therefore, any change in the DNA sequence that replaces one code for the leucine with another would not affect the amino acid composition of the protein. This would result in the synthesis of proteins with the same amino acid sequence from both the wild type and mutated genes.

7 0
3 years ago
2 Paragraph summery on how Anna Garcia died
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skvnewv

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6 0
4 years ago
Read 2 more answers
You have a culture of yeast that is at a concentration of 6.74 x 10^6 cells/ml. You dilute the sample 1:100, and then 1:100 agai
kramer

Answer:

22 cells

Explanation:

The concentration of numbers of cells = 6.74 x 10⁶ cells/ml

Dilution stages includes =  1:100  ;     1:100    &        1:3

The consecutive dilution stages can be calculated as:

= (6.74 x 10⁶) × (1/100)(1/100)(1/3)

=  222.42 cells/ml

= 2.22 × 10² cells/ml

So after addition  0.1 ml of the final dilution to a spread plate, the number of CFUs ( Colony forming units) we expect to count will be:

= (2.22 × 10² cells/ml)(0.1 ml)

= 22.2 cells

≅ 22 cells.

7 0
3 years ago
When the food supply is limited by competition, which rate is most likely to increase?
Tatiana [17]
The death rate will increase
7 0
2 years ago
Ignore the top please, but i need the answers to the bottom
Mekhanik [1.2K]

Answer:

7. Adenine (A), nitrogenous bases

8. cytosine

9. nucleotides

10. purine

11. double helix

12. genetic material

13. single-ring

14. double-ring

15.  nucleic acids

16. chromosome

Hope this helps :)

P.S. plz ask if you need any clarification

4 0
3 years ago
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