Answer the following question given this paragraph: Channel proteins provide an open channel or passageway through the cell membrane for molecules to move across. Many channel proteins allow the diffusion of ions. Ions are charged atoms. The charge makes it difficult to cross the cell membrane without assistance. Channel proteins are specific for the molecule they transport. For example a sodium ion crosses the membrane through a channel protein specific for sodium ions. Q: Ions are charged what? Choices: - molecules - protons - isotopes - atoms A:
atoms
(Question)
Answer the following question given this paragraph: Immovable joints allow no movement because the bones at these joints are held securely together by dense collagen. The bones of the skull are connected by immovable joints. Q: The bones of the skull are connected by what type of joints? Choices: - semi-mobile - pivoting - adjustable - immovable A:
(Answer)
immovable
Ques: Answer the following question given this paragraph: You can see the structural formula of glucose and two other sugars in Figure below . The other sugars in the figure are fructose and sucrose. Fructose is an isomer of glucose. It is found in fruits. It has the same atoms as glucose, but they are arranged differently. Sucrose is table sugar. It consists of one molecule of glucose and one molecule of fructose. Q: Sucrose consists of one molecule of glucose and one molecule of what else? Choices: - protein - lactose - alcohol - fructose A:
Ans: fructose
(Q).
Answer the following question given this paragraph: The last property above requires some additional explanation. We are all familiar with the process of dissolution on a large scale. If you stir a spoonful of salt into a glass of water, the salt crystals are broken down and seem to disappear into the water. On the atomic level, the dissolution of an ionic compound occurs when water interacts with the ions in the crystal lattice, causing the lattice to break apart ( Figure below ):. Q: On the atomic level, the dissolution of an ionic compound occurs when water interacts with the what in the crystal lattice? Choices: - atoms - fractals - particles - ions A:
(A).
ions
Ques:Answer the following question given this paragraph: Bacteria that stain purple are called gram-positive bacteria. They have a thick cell wall without an outer membrane. Q: What are bacteria that stain purple are called? Choices: - gram-neutral bacteria - gram-negative bacteria - complex bacteria - gram-positive bacteria A:

Ans:gram-positive bacteria
Question: Answer the following question given this paragraph: To balance a nuclear reaction. The two general kinds of nuclear reactions are nuclear decay reactions and nuclear transmutation reactions. In a nuclear decay reaction, also called radioactive decay, an unstable nucleus emits radiation and is transformed into the nucleus of one or more other elements. The resulting daughter nuclei have a lower mass and are lower in energy (more stable) than the parent nucleus that decayed. In contrast, in anuclear transmutation reaction, a nucleus reacts with a subatomic particle or another nucleus to form a product nucleus that is more massive than the. Q: When an unstable nucleus emits radiation and is transformed into the nucleus of other elements this is called? Choices: - naturally decay - explosive decay - fusion decay - radioactive decay A:
Answer:
radioactive decay