Biology A: Final Exam Questions and Answers Rated A+

Biology A: Final Exam Questions and Answers Rated A+ Which of the following shows a cell in metaphase of mitosis? XXX WRONG XXX Which elements, typically found in carbohydrates, would be expected to be used by the body to help make proteins and lipids? Select all that apply. carbon hydrogen XXX WRONG XXX sulfur What element is essential in helping our bodies break down substances found in our food? XXX WRONG XXX Digestive System What type of molecule is glucose? carbohydrate Which type of biological molecules often serve as enzymes that speed up chemical reactions? XXX WRONG XXX Catalyst In humans, how is gender controlled by chromosomes? XX Female XY Male What element is considered to be the element around which life on Earth is based because it forms essential molecules? Carbon What statements are true about glycolysis? Select all that apply. it does not directly require oxygen to operate it produces ATP that can be directly used by cells it consumes some ATP as well as producing it Which organ uses the circulatory system to communicate with cells throughout the body to control the amount of sugar they have available? Pancreas What is the term for a cell used for reproduction that contains one of every type of chromosome? gamete What would happen to blood cells if they are place in a hypertonic solution? Water would leave the cells and the cells would shrink. How does the body regulate the amount of carbon dioxide in the blood? it controls the rate of breathing by sending signals through the nervous system What role does respiration play in the cycling of carbon? it releases carbon dioxide gas that was once part of living cells into the atmosphere Which type of macromolecule is constructed of long chains of monomers called amino acids? Proteins What process allows the amount of DNA in an organism's cells to be kept constant in sexually reproducing species? reduction division Which ATP producing process donates electrons to oxygen molecules, causing them to react with hydrogen ions to form water? electron transport chain Which of the following describes the feedback that controls the blood pressure in the human body? XXX WRONG XXX When blood pressure drops, receptors in blood vessel walls tell the heart to beat more slowly to decrease the volume of blood flowing. How are channel and carrier proteins similar? Select all that apply. Channel and carrier proteins always move substances from the side of the membrane with the highest concentration to the side with the lowest concentration. Channel and carrier proteins are both types of facilitated transport What are the reactants and the products in the overall photosynthesis reaction? Reactants: water, carbon dioxide gas Products: sugar, oxygen gas Which molecule is a nucleotide that provides energy to run cell processes? ATP What do the two types of fermentation have in common? XXX WRONG XXX both directly produce ATP for the cell to use What is the role of triglycerides in the human body? Triglycerides store fatty acids, a major source of energy for cells. What is the function of the Calvin cycle? it fixes atmospheric carbon dioxide gas When would a cell be expected to use an active transport mechanism to move a substance from the outside environment into the cytoplasm? XXX WRONG XXX when a concentration gradient exists, and the same amount of substance is found inside and outside the cell What process uses oxygen and carbohydrates to release chemical energy for the use of cells? aerobic respiration Which human body process offers a clear example of positive feedback? blood clotting caused by thrombin What type of molecule forms the antibodies found in the human immune system? XXX WRONG XXX B Cells Which of the following best describes asexual reproduction? it can be an advantage to organisms that live in a stable unchanging environment Which statements describe an event from the light-dependent stage of photosynthesis? Select all that apply. ATP and NADPH are produced XXX WRONG XXX carbon dioxide is consumed Read the following description. When your body becomes dehydrated, the brain detects the lack of water and signals the pituitary gland to secrete a hormone called ADH. ADH travels through the blood and causes the kidneys to remove less water from the body. This is an example of which of the following? negative feedback helping to maintain homeostasis