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Angelina_Jolie [31]
4 years ago
9

Describe ddt and summarize

Biology
1 answer:
const2013 [10]4 years ago
4 0

Answer:

Dichlorodiphenyltrichloroethane, also commonly known as DDT, is a colorless, tasteless, and almost odorless crystalline chemical compound, an organochlorine. Originally developed as an insecticide, it became infamous for the environmental impacts it has. DDT was first synthesized in 1874 by the chemist Othmar Zeidler. DDT's insecticidal action was discovered by the chemist Paul Hermann Muller in 1939. DDT was commonly used in the second half of World War II to control malaria and typhus among civilians and troops. Muller was awarded the Nobel Prize in Physiology or Medicine in 1948 "for his discovery of the high efficiency of DDT as a contact poison against several arthropods".

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Key points: Cells have a variety of mechanisms to prevent mutations, or permanent changes in DNA sequence. During DNA synthesis,
MrMuchimi

Answer:

Explanation:

The above mentioned key points are mechanisms by which cells used to correct replication error and repair damaged DNA.

Proof Reading: while printing a page, the typesetter set the types and impression is taken, proof reading is done to correct mistakes if any, and the final printing is done. A similar follow up mechanism is done after DNA synthesis. If DNA polymerase detects an incorrect nucleotide pair, it will remove and replace with the correct nucleotide immediately.

Mismatch Repair:even after DNA synthesis, mismatch area(insertion or deletion) can be identified on the newly synthesized DNA.

In the mismatch repair, specific proteins scan the newly synthesized DNA strand. The mismatch area is identified and loop.

The second protein complex remove the mismatch segment. Finally correct segment is synthesized by the help of DNA polymerase, SSBs and ligase.

DNA damage repair mechanism: when DNA get damaged, there's a repair process that fix the damage. This includes Direct reversal, excision repair and Double stranded break repair

4 0
3 years ago
Explain the role of DNA and chromosomes in passing traits from parents to offspring?
Naddik [55]

\huge\mathsf{\red{\underline{\underline{Answer}}}}

{\green{\dashrightarrow}}The main role of DNA in the cell is the long-term storage of information. This backbone carries four types of molecules called bases and it is the sequence of these four bases that encodes information. The major function of DNA is to encode the sequence of amino acid residues in proteins, using the genetic code.

4 0
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What molecule makes instructions for proteins and is located inside a eukaryotic nucleus
Afina-wow [57]

Answer:

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In eukaryotic cells (ex. plants and animals) the DNA is found in the nucleus of the cell. Structures called ribosomes build proteins (this process is called translation).

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