During cell differentiation, new proteins are expressed
During cell differentiation, some genes are silenced while some or expressed. Different cells differentiate differently depending on the type of cell is going to become. This is why even though all the cells in a multcellular organism have the same DNA, they become different organ systems that look different.
Explanation:
Different differentiated cells produce different proteins because they express different genes. For example Cells of the epidermis of the skin express the genes for producing keratin (the pigment molecule) while those in the dermis do not express this protein because this gene is silenced in dermis cells. In addition, in dark-skinned people, these genes are more expressed that in people with light skin.
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Answer:
Extrinsic motivation: The narrator wants to adapt her behavior to please the girl in the mirror.
Explanation:
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The same protein, isoleucine, will be formed. No proteins will be formed at all. Tyrosine will be formed instead
Answer:
The deoxygenated blood enters the heart from the superior and inferior vena cava and pumped into the right atria then pushed down into the right ventricle from there the blood is pumped out through the pulmonary artery (the only place in the body where an artery has deoxygenated blood) to the lungs. The blood gets oxygenated and returns to the heart via the pulmonary vein (the only place in the body where a vein carries oxygenated blood) and pushed into the left atria the pumped into the left ventricle and out to the body via the aorta.
Explanation:
Enzymes
Enzymes have an active site where the substrate meets. This is where and how products are broken down. The break down of substrates through the use of enzymes is referred to as the lock and key model. Hope this helps
