RNAi is a mechanism involved in gene silencing, the process that turns on and off genes. To do that, it is triggered by double-stranded RNA (dsRNA).
The enzyme "dicer" cuts dsRNA into smaller fragments called (a) small interfering RNA. Once these fragments are cleaved, they bind to argonaut proteins and activate the RNA-induced silencing complex (RISC). This complex targets and degrades (a) specific messenger RNA (mRNA). By degrading the mRNA, this process interrupts the gene expression.
Alleles. When it comes to genes, alleles are basically your options - you have three alternative options for hair colors. For example - if someone with brown hair has a child with someone who has blonde hair, the child will have the alleles of brown and blonde hair
Answer:
Microscope
Explanation:
The discovery of cells arose from the development of the microscope: Robert Hooke first used the term “cell” following his observations of a piece of cork with a simple light microscope in 1665
Answer:
It processes the environment and sends out signals.
Explanation:
Sense receptors can sense any changes in internal or external conditions which disturb the homeostasis. The sensory information is sent to the central nervous system which in turn process the information and commands the respective body parts to perform actions to restore the homeostasis.
Example: The information about increased demand of oxygen during exercise is sent to the brain which in turn commands parts of breathing system and cardiovascular system to increase the breathing rate and heartbeat rate respectively to compensate for increased oxygen supply.
