Answer:
The correct answer is d. eukaryotes almost always produce polycistronic mRNA
Explanation:
mRNA can be polycistronic or monocistronic. A monocistronic mRNA contains the information of one gene only so a monocistronic mRNA code only one protein at a time but a polycistronic mRNA can code for multiple proteins at a time.
In eukaryotes, one transcriptional unit carries the information of only one protein so eukaryotes produce monocistronic mRNA but some eukaryotes are capable of having polycistronic mRNA.
In prokaryotes, many genes are transcribed as a unit to produce multiple proteins so prokaryotes produce polycistronic mRNA. Therefore the statement which is not true is d. eukaryotes almost always produce polycistronic mRNA.
It is not just the muscle cells that respire. All cells in the body need oxygen for respiration and all cells need to get rid of the carbon dioxide that they produce. In the lungs oxygen is taken from air into the blood and the blood transports the oxygen to the cells in all tissues of the body.As the muscles use the oxygen up,carbon dioxide is produced and absorbed into the blood. And this de-oxygenated blood is pumped back to the heart then on to the lungs. The lungs get rid of this carbon dioxide, and breathe in more oxygen.
Hope this answered your question.
The photosynthesis I guess
There are many factors that affect the rate of chemical reactions and temperature is one of them.
Typically, the higher the temperature of a chemical reaction the faster the reaction occur, that is, the temperature and the rate of chemical reaction are directly related. This is due to the fact that increasing the temperature of the reaction increases the kinetic energy of the reacting particles and thus they are able to move faster and the reaction also occur faster. Thus, from the options given, the correct answer will be D [40 degree], this is because, it is the highest temperature out of all the options given.
The correct answer is choice D
