Q: Q: All proteins are made of monomers called what? Read this paragraph and choose the correct option from the provided answers: Proteins are molecules that have many different functions in living things. All proteins are made of monomers called amino acids ( Figure below ) that connect together like beads on a necklace ( Figure below ). There are only 20 common amino acids needed to build proteins. These amino acids form in thousands of different combinations, making about 100,000 or more unique proteins in humans. Proteins can differ in both the number and order of amino acids. It is the number and order of amino acids that determines the shape of the protein, and it is the shape (structure) of the protein that determines the unique function of the protein. Small proteins have just a few hundred amino acids. The largest proteins have more than 25,000 amino acids. Choices: - monotides - aminotides - peptides - amino acids A:
A: amino acids

Q: Q: In which part of a bird stomach is food stored, soaked and mechanically ground? Read this paragraph and choose the correct option from the provided answers: Avian Birds face special challenges when it comes to obtaining nutrition from food. They do not have teeth and so their digestive system, shown in Figure 34.7, must be able to process un-masticated food. Birds have evolved a variety of beak types that reflect the vast variety in their diet, ranging from seeds and insects to fruits and nuts. Because most birds fly, their metabolic rates are high in order to efficiently process food and keep their body weight low. The stomach of birds has two chambers: the proventriculus, where gastric juices are produced to digest the food before it enters the stomach, and the gizzard, where the food is stored, soaked, and mechanically ground. The undigested material forms food pellets that are sometimes regurgitated. Most of the chemical digestion and absorption happens in the intestine and the waste is excreted through the cloaca. Choices: - pancreas - digestion - Gall bladder - gizzard A:
A: gizzard

Q: Q: What is the name for a simple machine that consists of two inclined planes? Read this paragraph and choose the correct option from the provided answers: Imagine trying to slice a tomato with a fork or spoon instead of a knife, like the one in Figure below . The knife makes the job a lot easier because of the wedge shape of the blade. A wedge is a simple machine that consists of two inclined planes. But unlike one inclined plane, a wedge works only when it moves. It has a thin end and thick end, and the thin end is forced into an object to cut or split it. The chisel in Figure below is another example of a wedge. Choices: - slope - pulley - lever - wedge A:
A: wedge

Q: Q: What theory proposes that microorganisms are the cause of many diseases? Read this paragraph and choose the correct option from the provided answers: The germ theory proposes that microorganisms are the cause of many diseases. Choices: - malignant theory - evolution theory - mutated theory - germ theory A:
A: germ theory