*Question*
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:
**Answer**
proteins

*Question*
Q: In the case of the wheelbarrow, the output force or load is between the pivot and the what? Read this paragraph and choose the correct option from the provided answers: Figure 9.24 (a) In the case of the wheelbarrow, the output force or load is between the pivot and the input force. The pivot is the wheel's axle. Here, the output force is greater than the input force. Thus, a wheelbarrow enables you to lift much heavier loads than you could with your body alone. (b) In the case of the shovel, the input force is between the pivot and the load, but the input lever arm is shorter than the output lever arm. The pivot is at the handle held by the right hand. Here, the output force (supporting the shovel's load) is less than the input force (from the hand nearest the load), because the input is exerted closer to the pivot than is the output. Choices: - velocity force - Driving Force - density force - input force A:
**Answer**
input force

*Question*
Q: When waves are reflected at the same angle, what is it called? Read this paragraph and choose the correct option from the provided answers: Reflected waves have the same speed and frequency as the original waves before they were reflected. However, the direction of the reflected waves is different. When waves strike an obstacle head on, the reflected waves bounce straight back in the direction they came from. When waves strike an obstacle at any other angle, they bounce back at the same angle but in a different direction. This is illustrated in the Figure below . In this diagram, waves strike a wall at an angle, called the angle of incidence. The waves are reflected at the same angle, called the angle of reflection, but in a different direction. Notice that both angles are measured relative to a line that is perpendicular to the wall. Choices: - field of view - refraction - phenomenon of reflection - angle of reflection A:
**Answer**
angle of reflection

*Question*
Q: What do vectors possess that scalars do not? Read this paragraph and choose the correct option from the provided answers: In physics, a quantity, such as mass, length, or speed that is completely specified by its magnitude and has no direction is called a scalar . A vector , on the other hand, is a quantity possessing both magnitude and direction. A vector quantity is typically represented by an arrow-tipped line segment. The length of the line, drawn to scale, represents the magnitude of the quantity. The direction of the arrow indicates the direction of the vector. Not only can vectors be represented graphically, but they can also be added graphically. Choices: - height and polarity - direction and texture - magnitude and weight - magnitude and direction A:
**Answer**
magnitude and direction