"The common ancestor of protists gave rise to many other types of eukaryotes" statement about protists explains its revised classification.
<u>Option: B</u>
<u>Explanation:</u>
All protists have the principal characteristic that they are eukaryotic organisms. This implies they consist a nucleus that is contained to the membrane. Many researchers believe that, when these three kingdoms deviated from general protist-like ancestor, billions of years ago, protists created a connection among plants, animals and fungi.
While this protist-like ancestor is a hypothetical creature, these ancient species can be traced to other genes present in modern animals and plants. Hence, historically, these species are deemed the first eukaryotic types of life and a precursor to fungi, plants and animals.
Anaphase, is the stage of mitosis when replicated chromosomes are split and the daughter chromatids are moved to opposite poles of the cell.
3
The label on a bag of salt-free pretzels indicates that their chips are "low-fat." this means the pretzels provide 3 gram(s) of fat or less per serving.
Low-fat diets are diets in which the fats are reduced. Low-fat diets are produced in order to prevent diseases such as obesity and heart diseases. Food manufacturers usually use nutrient claims such as '‘low fat’' to indicate the nutritional value of their products. A ‘low fat’ food contains not more than 3g of fat per 100g of food (for solids) and not more than 1.5g fat per 100g (for liquids).
The two main stages involved in protein synthesis that is in central dogma theory are transcription and translation. The process of transcription and translation occurs in the nucleus and ribosome respectively. In the translation process, DNA is used as a template and mRNA is synthesized. In translation, a protein is synthesized by translating the codon.
Further Explanation:
The double-helical structure of DNA is duplicated through a process called DNA replication. Then, the DNA undergoes a process of transcription and form RNA. After this, RNA processing starts with post-translation modification and forms three different types of RNA molecules that are rRNA, tRNA, and mRNA. Transcription mainly occurs in the nucleus of the cell. In this stage, DNA acts as a template and synthesized new mRNA. Then, the formation of protein occurs. After the process of transcription, mRNA goes into the ribosome to synthesize new protein. In TRANSLATION processes, mRNA is converted to protein. Transfer ribonucleic acid is a kind of RNA that helps in decoding a messenger RNA sequence into a specific protein.
In TRANSLATION processes, mRNA is converted to protein, but to translate mRNA, it goes under many processing before into protein mainly in eukaryotes.
- 5’Capping: In capping 7, ’methylguanosine is added to the 5’end of the transcription result by joining 5’to 5’phosphate.Capping is done only to protect the nascent mRNA from degradation and help in initiating translation.
- 3’poly A tail: Around 100-250 residue of adenine nucleotide added to the 3’end of mRNA to maintain the stability of mRNA. Firstly, the 3’end of mRNA is cleaved and makes free 3’OH. Poly-A tail help in transporting the mRNA from the nucleus to cytoplasm for the translation process.
Learn more:
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Answer Details:
Grade: High School
Subject: Molecular Biology
Chapter: Gene expression
Keywords:
DNA, RNA, replication, double helical, nucleotides, transcription, proteins, translation, mRNA, rRNA, tRNA, RNA, converted, messenger, ribosome, nucleus.