Answer:
B
Explanation:
Hence When we eat food it closes but when we talk While eating the epiglottis would remain open and the food may enter windpipe which may trigger violent coughing to clear the food material out of trachea or may get serious by Chocking and may be fatal. That is why it is not advised to talk while eating
They have already had it and carrier of it with asymptotic and never knew or if they catch after rains peoples systems are low. In immune systems that is the natural fighter that cross the blood and brain. Barrier if low they can be prone to catching it as well.
But the answers provided im not seeing the real answer as in they put the problem that caused a. Disease in a vaccine only so much of it and add antidote example flu shot . It attacks some people immune system and they get sick because of injecting it into them but the belief is of catching it after I don’t believe I believe either your body can handle it or it does not and rejects it in the blood brain barrier so if recieved then you will get sick after getting the immunization
The answer is B . Neutrons are found in nucleus
Answer:
Please find the detailed explanation of this statement below
Explanation:
Firstly, a repressed gene is a gene whose expression has been inhibited or repressed. The lac operon in E.coli bacteria is a regulatory unit containing structural genes, a single promoter and operator regions. The promoter is the region where the transcription enzyme (RNA polymerase) binds to in order to transcribe the genes in the lac operon. The structural genes in the lac operon can only be expressed in the presence of lactose sugar.
However, in the absence of lactose, LAC REPRESSOR, which is a transcription factor (protein), prevents the binding of RNA polymerase to the PROMOTER region by binding to the OPERATOR region of the lac operon. This inhibits the expression of the lactose genes in the operon.
Note that, the structural genes in the lac operon (lacZ, lacY, lacA) code for proteins that help break down lactose sugar for energy in the E.coli bacteria. Therefore, a bacteria cell with a repressed lac operon will be unable to degrade lactose sugar.
No there are no vacuoles in a human but there are in a plant but not humans.
