Explanation:
During PCR, we use two primers one is forward primer and the other one is reverse primer they match the sequence of one one of the two complementary strands of the target DNA, they flank the target region (that the region which we has to be copied). if we add only one primer it copies only one strand of the DNA in multiple copies. Usually we call this as Asymmetric PCR.
Generally Primers are synthetic short stretch of oligonucleotides that are complementary to the target DNA. They act as a foundation for the amplification process of DNA to form multiple copies
Answer:
the concentration of the solute is lower inside the cell than outside it
Explanation:
This question depicts the process of ACTIVE TRANSPORT, which is the movement of a substance against concentration gradient, hence, requires energy input (ATP) to occur. In this case, transporting a solute from inside an animal cell to the extracellular fluid across the cell membrane always requires energy.
This is because the concentration of solute inside the cell is much lower than that of the extracellular fluid, hence, to move the solutes against this concentration gradient (low to high), energy in form of ATP is required.
Answer:
Humans and fungi have a few similarities and a few differences.
Human's and fungi have similar feeding habits.
1- They are both heterotrophic (unlike plants, algae, etc. )
This refers to the fact of generating energy by consuming elements in the ecosystems.
This means that both get energy by feeding on other organisms.
2-Humans and fungi both cannot produce their own food using photosynthesis. They are not like plants.
Explanation:
Ans.
Neural crest cells are embryonic cells that are unique to organisms of phylum chordata. These cells give arise a number of cell lineage, such as bone and cartilage, melanocytes, smooth muscle, glia and neurons, eyes, teeth, and other sense organs. The neural crest cells do not form pharyngeal slits in invertebrate chordates.
Thus, the correct answer is option b).
Answer:
The gray matter in the spinal cord is located in the <u><em>grey column</em></u> , and its shape resembles a letter H, or a butterfly. The cell bodies of somatic motor neurons are primarily housed in the <u><em>ventral or anterior</em></u> horns, which innervate skeletal muscle.
Explanation:
The grey matter is a component of the central nervous system that contains neuronal and glial cells and it can be found in the brain, brainstem and <em>spinal cord, in this last one, is found in the grey column, a mass of grey matter shaped in H form.</em>
In this column the grey matter is divided into four columns (as you can see in the image I added):
- The dorsal or posterior horn: contains somatosensorial neurons
- <em> The ventral or anterior horn: contains somatic efferent motor neurons (they exit the spinal cord to innervate skeletal muscle) </em>
- The intermediate column: contains neurons to innervate visceral organs
- The lateral horn: same as the intermediate column
I hope you find this information useful and interesting! Good luck!
