Answer:
D
Explanation:
It's the one that makes the most sense
Direct repair is mutation repair that does NOT involve the removing and repairing of nucleotides
A mutation in biology is an adjustment to the nucleic acid sequence of an organism's, virus's, or extrachromosomal DNA. DNA or RNA can be found in the viral genome. Since mutation results in a new DNA sequence for a particular gene, resulting in a new allele, it is crucial as the initial stage of evolution. Through intragenic recombination, recombination can also produce a new DNA sequence (a new allele) for a particular gene.
DNA proofreading and repair systems often identify mutations and mutation repair. The cell will also go through programmed cell death (apoptosis), which prevents the flawed DNA from being passed on if the damage cannot be repaired. Only when these systems are compromised do mutations take place and are transmitted to daughter cells.
What kind of mutation repair does NOT involve the removing and repairing of nucleotides?
a. mismatch repair
b. base-excision repair
c. direct repair
d. None of the above, because all repair involves the removing of mutated nucleotides.
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There is a food vacuole in the cytoplasm of the amoeba. Both f<span>ood storage and digestion take place inside. Once digested, it reaches each cell organelle. </span>
1. A transgenic organism expresses DNA that has been derived from another species. These organisms have altered genomes and are generated in the laboratory for the purposes of research, for example, the "knock-out" mice are tansgenic mice with a particular gene of interest disabled.
2. Recombinant DNA is the DNA that has been altered to contain genes, or portions of genes, from different organisms. The DNA molecules are formed in the lab using recombination methods to bring together genetic material from multiple sources and therefore creating sequences that are not found in the genome.
3. Restriction enzymes are found naturally in bacteria and they cut DNA at specific nucleotide sequences. These enzymes are also called restriction endonucleases, they cleave DNA into fragments at or near specific recognition sites called restriction sites. They are found in bacteria and archaea and they serve to provide a defense mechanism against invading viruses.
4. Biotechnology is the use or alteration of organisms, cells, or biological molecules to produce food, drugs, or other goods. Living systems and organisms are used to make or develop products. Biotechnology enhances cellular and biomolecular processes to develop technologies and product for the purposes of improving life and health.
5. Polymerase chain reaction is a technique that is used to quickly synthesize billions of copiies of a specific segment of DNA. It is a quick and a very efficient way to generate many copies of DNA. The process is applicable when there are small quantities of DNA to analyze. The events of PCR involves; separation of DNA strands, addition of primers, use of DNA polymerase to produce second strand of DNA.
6. In the process known as transformation, bacteria take up pieces of DNA from the surroundings. Bacterial transformation results from the uptake of naked DNA (DNA without associated cells or proteins). Transformation may also occur naturally in some species of bacteria.
Answer: the answer is option A. 5 → 1 → 6 → 3 → 2 → 4
Explanation: the events that describe progress of a protein that will be secreted from cell are as follows; Protein synthesis begins in the cytosol, SRP binds to the growing polypeptide chain and to the ribosome, Translation pauses, SRP binds to its receptor, Translation resumes and finally - The signal sequence is cleaved. All these formed the sequence 5 → 1 → 6 → 3 → 2 → 4
