Q: Food chewed evenly during mastication moisten and lubricate the lining of the mouth and this? Read this paragraph and choose the correct option from the provided answers: Food is chewed evenly during mastication Moisten and lubricate the lining of the mouth and pharynx. Choices: - esophagus - trachea - larynx - pharynx A:
pharynx

Q: When lactose is absent, a repressor protein binds to what? Read this paragraph and choose the correct option from the provided answers: When lactose is absent, a repressor protein binds to the operator. The operator is located between the promoter and the three lac operon genes. The protein blocks the binding of RNA polymerase to the promoter. As a result, the lac genes are not expressed. Choices: - differential - network - worker - operator A:
operator

Q: What kind of air does a continental polar air mass hold? Read this paragraph and choose the correct option from the provided answers: An air mass takes on the conditions of the area where it forms. For example, a continental polar air mass has cold dry air. A maritime polar air mass has cold moist air. Which air masses have warm moist air? Where do they form?. Choices: - cool moist air - frigid wet air - warm dry air - cold dry air A:
cold dry air

Q: What term is used to describe the cellular structures responsible for protein synthesis? Read this paragraph and choose the correct option from the provided answers: Ribosomes Ribosomes are the cellular structures responsible for protein synthesis. When viewed through an electron microscope, free ribosomes appear as either clusters or single tiny dots floating freely in the cytoplasm. Ribosomes may be attached to either the cytoplasmic side of the plasma membrane or the cytoplasmic side of the endoplasmic reticulum (Figure 3.7). Electron microscopy has shown that ribosomes consist of large and small subunits. Ribosomes are enzyme complexes that are responsible for protein synthesis. Because protein synthesis is essential for all cells, ribosomes are found in practically every cell, although they are smaller in prokaryotic cells. They are particularly abundant in immature red blood cells for the synthesis of hemoglobin, which functions in the transport of oxygen throughout the body. Choices: - chromosomes - chloroplasts - nuclei - ribosomes A:
ribosomes