Question

20) - 24) Diffusion is a process by which a substance A) goes down its concentration gradient. B) goes from lesser to greater concentration C) goes up its concentration gradient D) is at equilibrium 25 25) What product(s) do plants produce during photosynthesis that is/are used by humans and other animals? A) glucose B) carbon dioxide C) oxygen D) glucose and oxygen 26) The term that describes the diffusion of water is A) simple diffusion. B) equilibrium C) facilitated diffusion D) active transport. E) Osmosis. 27) The second law of thermodynamics states that A) all living organisms must eat to derive energy B) energy can be either created nor destroyed C) in energy-yielding reactions, matter goes froen a more-ordered to a less-ordered state. D) energy is required to bring molecules into a cell against a concentration gradient in which a cell engulfs another cell. 28) Phagocytosis is a type of A) facilitated diffusion B) endocytosis C) Exocytosis D) passive transport E) active transport 29) People with oxidative phosphorylation disorders offer a lack of energy that can lead to diminished function of nerve and muscle cells. The organelle most likely to be altered in oxidative phosphorylation disceders is the A) rough endoplasmic reticulum. B) chloroplast C) cytoskeleton D) mitochondrion E) cell wall 30) 30) Which of the following molecules is produced in the intermediate step between glycolysis and the Krebs cycle? A) oxaloacetate B) ATP C) citric acid D) pyruvic acid E) acetyl COA

Answer 1

QUESTION 24

The correct answer is A

In this case, the process of diffusion occurs when a substance moves from a region of high concentration to a low concentration. In a permeable membrane, the region of higher concentration will go down its concentration gradient.

QUESTION 25

The correct answer is D.

In this case, two main products are used by humans, oxygen and glucose. The oxygen is used by humans and animals to make the process of cell respiration. Once we consume the oxygen, we produce CO2 which is used by the plants to keep their metabolism. Glucose is also used, we can extract sugar from a variety of plants. This glucose is used as a source of energy in the process of glycolysis.

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