19. rnai is a technique that silences genes by targeting them and degrading their mrna. how can this technique be used in scientific
laboratories?
a. rnai allows scientists to turn off one gene specifically to study its effect.
b. rnai is observed in nature, but it can't be used in laboratories
c. rnai has been used in laboratories to make bacteria more susceptible to antibiotics, but has limited application in eukaryotic cells
d. rnai is a powerful tool for degrading mrna, but because it doesn't degrade other types of rna, its use is limited.

RNAi allows scientists to turn off one gene specifically to study its effect.

Explanation:

RNAi is widely used technique for silencing the genes by targeting them and then degrading their mRNA. It silence the genes so that their functions could be studied. It is extensively used in research and can be utilized for any gene just by designing RNAi for that specific gene. It can silence a single genes which make it more useful not only in labs but also in therapeutic approaches for treatment of diseases, cancers etc.

1: the largest region of the brain is the:

  cerebrum

2. the term "psychology" literally means:

the process or procedure of the science or study of the mind.

3. the area of the brain responsible for respiration, heart rate, and smooth muscle control of our blood vessels is t

medulla oblongata

4. the structure that conducts nerve impulses to and from the brain and serves as a reflex center for some sensory information without input from the brain is the:

spinal cord

5. the three-layered membrane that covers the brain and spinal cord and literally means membrane is called the:

meninges

6. the cord-like (string-like) structures that carry bio-electrical impulses from one part of the body to another are called

nerves

7. a group of nerve cell bodies that are found outside of the spinal cord and brain are referred to as:

ganglions or ganglia (pl.) “literal meaning knot”

8. the term that means spinal cord inflammation is:

myel/itis