Answer:
(a) type 1 diabetes risk factors are likely more prevalent in caucasians than in other races
Explanation:
Both diabetes types, I and II, have different origins. However, they share the fact that people inherit only the predisposition of developing the disease and that the environmental conditions might trigger the expression of the disease. The final result is hyperglycemia and the risk of developing chronic microvascular and macrovascular complications.
In the case of Diabetes I, both parentals must provide the genes to the child. This is, the predisposition of getting the disease must be inherited from both parents.
It is suggested that white people express most commonly Diabetes 1, making it more common in caucasian people that show the highest rate of affection.
So to express diabetes 1, white people need to inherit the genes from both parents, but also they must be exposed to conditions that provoke the expression of diabetes. Environmentally, different factors might influence, such as weather, feeding habits, viruses, among others.
Answer:
a. is converted to NAD+ by an enzyme called dehydrogenase
Explanation:
The electron transport chain of cellular respiration is the final step that oxidized NADH and FADH2. These reducing powers are formed during glycolysis and Kreb's cycle. Complex I of the electron transport chain present in the inner mitochondria membrane is NADH dehydrogenase. This protein complex accepts electrons from NADH and oxidizes it into NAD+. NADH dehydrogenase couples oxidation of NADH with the pumping of proton towards the intermembrane space.
Ans.
The Che proteins (chemotaxis proteins) are cytoplasmic proteins that play an important role in signal transduction pathways between the repellent or attractant and flagellar motor switch of a bacterium. Bacterial cell membranes contain different chemoreceptors for different attractants and repellents.
When a repellent or attractant binds with a chemoreceptor, stimulation of signal-transduction pathway occurs. It sends a signal to the cytoplasmic domain of receptor, which interacts with Che proteins, present at cytoplasm. The rate of auto-phosphorylation decreases when an attractant binds with receptor, while the rate of auto-phosphorylation increases when an attractant binds with receptor.
Thus, 'the attractant enhances smooth swimming and counterclockwise rotation towards the chemical source, which repellent enhances tumbling clockwise rotation away from a chemical source.'
Answer:
Diffusion is the net movement of anything (for example, atoms, ions, molecules) from a region of higher concentration to a region of lower concentration. Diffusion can occur in any mixture, including one that includes a semipermeable membrane, while osmosis always occurs across a semipermeable membrane.
Explanation:
An endotherm, also called as a warm-blooded organism, has the ability to generate heat internally. One advantage to being an endotherm, instead of an ectotherm, is that an endotherm can generate its own body heat. This kind of organism can create a favorable level of body heat that is independent of its environment. Endotherms include mammals and birds.