Q: What are long chains of amino acids? Read this paragraph and choose the correct option from the provided answers: The reverse reaction (amide hydrolysis) is very useful in the study of protein structure. Proteins are long chains of amino acids (each amino acid contains an amine group and a carboxyl group, both attached to a central carbon atom). The amino acids are linked together by amide bonds to form the long protein chain. One of the techniques for looking at protein structure is to break those amide linkages so we can learn the identity of the amino acids in the chain. We do this through a hydrolysis reaction:. Choices: - lipids - Fatty Acid Chains - cells - proteins A:
proteins

Q: Dermal tissue covers the outside of a plant in a single layer of cells called what? Read this paragraph and choose the correct option from the provided answers: Dermal tissue covers the outside of a plant in a single layer of cells called the epidermis . You can think of the epidermis as the plant's skin. It mediates most of the interactions between a plant and its environment. Epidermal cells secrete a waxy substance called cuticle , which coats, waterproofs, and protects the above-ground parts of plants. Cuticle helps prevent water loss, abrasions, infections, and damage from toxins. Choices: - cambium layer - scales - cuticle - the epidermis A:
the epidermis

Q: What does pushing an object over the surface of a ramp cause? Read this paragraph and choose the correct option from the provided answers: Consider the ramp in Figure below . It's easier to push the heavy piece of furniture up the ramp to the truck than to lift it straight up off the ground. However, pushing the furniture over the surface of the ramp creates a lot of friction. Some of the force applied to moving the furniture must be used to overcome the friction. It would be more efficient to use a dolly on wheels to roll the furniture up the ramp. That's because rolling friction is much less than sliding friction. As a result, the efficiency of the ramp would be greater with a dolly. Choices: - Acceleration - vibration - tension - friction A:
friction