The correct option is C.
Post transcriptional control of gene expression refers to the process by which primary transcripts of RNA, which are formed in the nucleus of eukaryotic cells are converted into mature RNA. The process occurs after transcription and prior to translation.
In eukaryotic cells generally, gene expression is typically controlled at the transcription level. The process of post transcriptional occurs in two stages; the first stage is called RNA splicing stage and the second stage involves the control of RNA stability.
RNA SPLICING Stage: The primary RNA transcript is made up of two different regions, the exons regions, which code for proteins and the introns regions, which do not code for any protein. At the RNA splicing stage, the introns are spliced and removed from the RNA strand. This is the reason why option C is correct.
The second stage involves the addition of protective caps to the two ends of the RNA strands. These caps prevent the degradation of the RNA strand, thus, making it stable.
After this process, the mature RNA that has just been formed leaves the nucleus and move to the cytoplasm area of the cell, ready to carry out the process of protein translation.
Answer: Transcription is the first step in gene expression. It involves copying a gene's DNA sequence to make an RNA molecule. Transcription is performed by enzymes called RNA polymerases, which link nucleotides to form an RNA strand (using a DNA strand as a template).
Explanation:
Answer:
Animal clade
Explanation:
<em>A clade is used to refer to all members of group of organisms that share the same ancestor.</em>
Animals are the only group of living organisms that are eukaryotic, multicellular as well as heterotrophic in nature.
They are eukaryotic because their cells have nucleus and membrane-bound organelles like mitochondrion and chloroplast.
They are multicellular because their bodies are made up of more than one cells. The simplest animal (sponge) is made up of several cells while the most complex animal (human) is made up of millions of cells.
Animals are heterotrophs because they lack the capacity to manufacture their own food. They depend on external source for their food. Particular, animals ingest their foods, digest it internally and egest undigested food/waste materials.
Darwin concluded that the finches all shared a common ancestor but had developed different beak structures. The second sentence best describes as an ecosystem.
Explanation:
- When Charles Darwin traveled to the Galapagos Islands, he observed 14 distinct varieties of finches on the islands Darwin also observed that each finch variety ate a different type of food and lived in a slightly different habitat from the other finches, Darwin concluded that the finches all shared a common ancestor but had developed different beak structures. The second sentence best describes as an ecosystem.
- An ecosystem is a huge group of living organism such as plants,animals, micro-organisms in a particular area.
- An ecosystem is a community of living organisms related with the nonliving components in the environment, together interacting as a system.
- its abiotic constituents, includes minerals, climate, soil, water, sunlight, and all other nonliving elements, and its biotic constituents, consists of all its living members.
Julie listed out fossil fuels are a non-renewable source of energy and Fossil fuels are becoming more expensive.
Option C
<h3><u>Explanation:</u></h3>
Fossil fuels are defined as the type of non renewable energy which is formed as a result of dead and decaying organic matter over thousands of years under pressure and temperature of Earth’s core.
This type of fuels are formed due to the dumping of dead prehistoric organisms like dinosaur and others under the soil under a tremendous pressure and very high temperature, where they are acted upon by bacteria and other chemicals to reduce them into petroleum and coal. These are totally non renewable and they are getting expensive over days due to shortage of availability.