<span>siRNA guides the RISC that cleaves the target mRNA. siRNA binds to its target mRNA due to its complementarity.</span> <span>Small interfering RNA (siRNA) has a function in RNA interference, which means it causes gene silencing through repression of transcription. siRNA together with some proteins (like Argonaute) form the RISC. When siRNA recognize the target mRNA it causes degradation of mRNA and thus silencing the gene that encodes that mRNA.</span>
Answer:
A closed system is a physical system that does not allow transfer of matter in or out of the system, though, in different contexts, such as physics, chemistry or engineering, the transfer of energy is or is not allowed.
<span>In liver, the most intensively studied transmembrane and intracellular signal transduction pathways are the Janus kinase signal transduction pathway, the mitogen-activated protein kinases signal transduction pathway, the transforming growth factor β signal transduction pathway, the tumor necrosis factor α signal transduction pathway and the recently discovered sphingolipid signal transduction pathway. All of them are activated by many different cytokines and growth factors. They regulate specific cell mechanisms such as hepatocytes proliferation, growth, differentiation, adhesion, apoptosis, and synthesis and degradation of the extracellular matrix. The replication cycle of hepatitis C virus (HCV) is intracellular and requires signal </span>
Answer:
<u>True</u>
Explanation:
There are <u>two components of efferent/motor nervous system</u>.
1.<u>Autonomic Nervous System</u>
It innervates the<u> smooth muscles, glands and cardiac muscles and is under involuntary control. ANS is further divided into Sympathetic nervous system and parasympathetic nervous system.</u>
It is composed of<u> preganglionic neurons</u> and <u>postganglionic neurons</u>. <u>The axons of preganglionic neurons synapse on the cell bodies of postganglionic neurons. </u>
Autonomic ganglia of sympathetic nervous system form the paravertebral ganglia (long chains on either side of spinal cord) and autonomic ganglia of parasympathetic nervous system are located close to the organ which the fibers innervate.
<u>2. Somatic Nervous system</u>
It is responsible for<u> voluntary control of skeletal muscles and is composed of motor nerve and the innervated muscle.</u>
