Mechanical digestion begins in the mouth as the food is chewed. Chemical digestion involves breaking down the food into simpler nutrients that can be used by the cells. Chemical digestion begins in the mouth when food mixes with saliva. Saliva contains an enzyme (amylase) that begins the breakdown of carbohydrates.

7 0

3 years ago

When the offspring's phenotype is a "combination" (mixture) of parents' phenotypes

mel-nik [20]

Answer: C) Codominance

Explanation:

When the offsprings phenotype is a combination of both parents

3 0

3 years ago

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You are asked to study a new inhibitor of oxidative phosphorylation. When it is added to a suspension of mitochondria carrying o

scoundrel [369]

Answer:

DNP produces the loss of the proton gradient (i.e., the energy of the proton gradient is dissipated in the form of heat instead to produce ATP)

Explanation:

2,4-Dinitrophenol (DNP) acts to shuttle H+ ions across cellular membranes, bypassing the ATP synthase used by mitochondria to generate ATP during cellular respiration. Since DNP is able to bypass ATP synthase, this compound uncouples the phosphorylation of ADP by the ATP synthase from the process of oxidation (i.e., transport of electrons). For example, in muscle cells, DNP may be used to shuttle calcium ions (Ca +) from mitochondrial stores, and free intracellular Ca+ ions are evidenced to produce muscle contraction.

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4 years ago