This is a process called transcription and translation.
Information to synthesize a particular protein is found in DNA in the cell nucleus. This information is copied (transcribed) onto messenger RNA or mRNA in short. The copying process is called transcription.
mRNA then leaves the nucleus and enters the cytoplasm where it attaches to a ribosome. Transfer RNA or tRNA then begins to read (translate) the information on the attached mRNA. This is the process of translation.
tRNA then fetches amino acids that correspond to this information and brings them to the ribosome where they are linked together into a chain. This chain of amino acids is the primary structure of the protein.
Answer:
c. the plant root growing down into the soil
Explanation:
The plant root going down deep into the soil is an example of positive gravitropism. Gravity pulls everything towards the center of earth i.e. downwards and roots follow the direction of gravity automatically by growing downward towards soil that is why it is known as positive gravitropism. In short we can say that root favors the direction of gravity.
Shoot on the other hand show negative geotropism/gravitropism i.e. it grows towards the opposite direction of gravity. Shoot grow towards upside direction i.e. away from the surface towards sky.
Endocrine gland functions with your hormones. Exocrine gland deals with waste and getting rid of it. Which both of them don’t deal with digestion.
Answer:
One of Schwann and Schleiden’s ideas was that <em>cells were originated by spontaneous generation</em>, which was later rejected by Virchow.
Explanation:
Schwann studied animal tissues, and by observing them, he concluded that tissues were made of cells.
Simultaneously, Schleiden arrives at the same conclusion when studying vegetable tissues.
Around 1830, they met and together proposed the first cell theory. The theory stated that:
- Every living being is made of cells.
- Cell is the basic unit of life.
- Cells are originated by spontaneous generation.
Virchow, who studied human tissues, during his observations sow the cell in its dividing process. He then proposed that <u>cells were not originated from spontaneous generation</u>, but they were the product of other pre-existing cells and were originated by <u>cellular division</u>. He rejected the third state of Schwann and Schleiden’s ideas.
