-All signal transduction cascades are shut down immediately so as to prevent the cell from mounting a response.
-Cells are unable to respond quickly to hormones, and therefore signal transduction cascades always occur over a long time.
-Cells have to be able to function alone, because they are unable to work together in a coordinated fashion.
-Cells often have to respond very quickly to changes in their internal and external environments.
A. a plasma membrane
B. vacuoles
C. cell wall
D. cytoplasm
E. chloroplasts
F. protoplasm
-be inorganic
-be organic
-be made naturally
-have a crystalline structure
-be a solid
-have a homogenous composition
Answer: The precise chemical composition and internal atomic structure that defines each mineral also directly determines its outward appearance and physical properties. Thus, in most cases, general appearance and a few easily determined physical properties are sufficient to identify the mineral.
Explanation:
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b. a transmission electron microscope, because it has high resolution
A scanning electron microscope would be the best choice for a scientist examining the living cells lining the respiratory tract. This is due to its capability of scanning the surface of the whole cells, which is essential to properly observe the tiny hairs on these cells that move dirt and mucus away from the lungs.
To explore living cells lining the respiratory tract, the best instrument would likely be a scanning electron microscope (SEM). While both SEM and transmission electron microscopes provide high-resolution images, a key difference is how they interact with the specimen. The SEM scans the surface of whole cells, making it ideal for observing the tiny hairs, or cilia, on the cells of the respiratory tract. These tiny hairs move in coordinated waves, pushing mucus and trapped particles out of our lungs. This process can be best observed on the whole cell surface, which is why SEM would be preferred.
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The mutation in DNA causes the changes in enzymes to read the DNA sequence incorrectly or unable to read the sequences. So, the sequence will code for the wrong amino acid by the process of translation, and not make the correct protein.
protein synthesis can be defined as the process in which amino acid sequence can be formed from m RNA sequence, means the nucleotide sequence encode amino acid called as the genetic code.
Translation occur in cytoplasm, it involves in transportation of amino acid to the ribosome and form polypeptide chain, one translator conducts the translation and another is substrate where the mRNA is translated into a new protein
Ribosomes have the major component responsible for of ribosomal RNA (rRNA) and proteins, these rRNA peptidyl transferase bind to the large subunit with three active sites (E, P, A) of amino acids which are responsible for catalytic activity.
Learn more about translation, here:
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Answer:
The mutation in DNA causes the enzymes to read the gene sequence incorrectly. So, the sequence will code for the wrong amino acid, and the cell will not make the correct protein.
Explanation:
Answer:
Skeletal muscle is called voluntary because you can control this type of muscle. You can voluntarily choose to move them. These muscles attach to bones, move the skeleton, and are found in the arms, legs, neck, or anywhere you can voluntarily move a body part. These muscles produce strong contractions.
Explanation: