If a bacterial cell is placed in a hypertonic (hyperosmotic) solution:There is no net movement of water either into or out of the cellWater moves through the plasma membrane into the cellWater moves through the plasma membrane out of the cell, causing plasmolysisNone of the other four answers describes what happens in a hypertonic solutionThe cell may undergo osmotic lysis Which of the following statements is NOT true?Enzymes increase the probability that a chemical reaction will take place by lowering the activation energyThe energy required to cause a chemical reaction to occur is called the activation energyChemical reactions in living cells are catalyzed by enzymesNone of the other four answers (all are true)Decomposition (degradation, catabolic) reactions are usually endergonic

Introduction:- Bacteria are prokaryotic organisms because they do not have a well defined and…

If a bacterial cell is placed in a hypertonic (hyperosmotic) solution: There is no net movement of water either into or out of the cell Water moves through the plasma membrane into the cell Water moves through the plasma membrane out of the cell, causing plasmolysis None of the other four answers describes what happens in a hypertonic solution The cell may undergo osmotic lysis

If a bacterial cell is placed in a hypertonic (hyperosmotic) solution: There is no net movement of water either into or out of the cell Water moves through the plasma membrane into the cell Water moves through the plasma membrane out of the cell, causing plasmolysis None of the other four answers describes what happens in a hypertonic solution The cell may undergo osmotic lysis

Human Biology (MindTap Course List)

11th Edition

ISBN:9781305112100

Author:Cecie Starr, Beverly McMillan

Publisher:Cecie Starr, Beverly McMillan

Chapter3: Cells And How They Work

Section: Chapter Questions

Problem 7SQ: Which of the following statements is not true? Metabolic pathways _____. a. occur in a stepwise...

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Which of the following statements is not true? Metabolic pathways _____. a. occur in a stepwise series of chemical reactions b. are speeded up by enzymes c. may break down or assemble molecules d. always produce energy (such as ATP)
Which of the following statements is NOT true? None of the other four answers (all are true) The energy required to cause a chemical reaction to occur is called the activation energy Decomposition (degradation, catabolic) reactions are usually endergonic Chemical reactions in living cells are catalyzed by enzymes Enzymes increase the probability that a chemical reaction will take place by lowering the activation energy
Which of the following statements is false regarding an enzyme's ability to catalyse a reaction? an enzyme provides a reaction surface and a hydrophilic environment for the reaction to take place an enzyme binds reactants such that they are positioned correctly and can attain their transition-state configurations an enzyme allows the reaction to go through a more stable transition state than would normally be the case an enzyme can weaken bonds in reactants through the binding process
Another of the six enzyme classes is which of the following? enzymes catalyze. These classes include the transferases, isomerases, and ligases. All enzymes can be categorized in one of six major classes based on the reactions the proteases kinases hydrolases phosphatases endonucleases An important factor that influences the rate of a biochemical reaction is the temperature. Raising the temperature of a biochemical reaction has which effect upon the kinetics of the reaction? a) b) c) d) e) increases the free energy of the reactants increases the free energy of the transition state decreases the free energy of the reactants decreases the free energy of the transition state decreases the free energy of the products
The following speaks true of metabolism EXCEPT* Property consistent to all organisms ranging from prokaryotes to the human organism. Sum total reactions in the body Metabolic reactions contribute to homeostasis by harvesting chemical energy Metabolic reactions are entirely exergonic reactions Which of the following best characterizes ANABOLISM?* It is largely exergonic reaction because it releases energy in the form of heat It is involved in the building up process from polymers to monomers Reactions are usually oxidative and degradative Plays a crucial role in growth repair and maintenance of body structures The oxidation of glucose to produce ATP is also known as cellular respiration, and it involves four sets of reactions, which of the following is not part of the four sets of reactions?* Formation of pyruvic acid Glycolysis Formation of acetyl coenzyme A Citric Acid cycle Which of the following is an inaccurate statement?* fatty acids and glycerol are the building…
Select all the statements that are correct with respect to enzymes: Multiple answers: Multiple answers are accepted for this question Select one or more answers and submit. For keyboard navigation. SHOW MORE V During an enzymatic reaction - the enzymes are not used up in the reaction and actually they can be recycled as long at a the reactant is available b The special molecules that catalyze biochemical reactions are called enzymes. they perform the critical task of lowering the activation energies of chemical reactions inside the cell. d they perform the critical task of increasing the activation energies of chemical reactions inside the cell. e enzymes don't change whether a reaction is exergonic (spontaneous) or endergonic. f The chemical reactants to which an enzyme binds are the enzyme's active site The chemical reactants to which an enzyme binds are the enzyme's substrates h The location within the enzyme where the substrate binds is called the enzyme's active site.
Which of the following is NOT true about enzymes? Enzyme inhibitors interact reversibly or irreversibly with an enzyme to alter its Km and /or Vmax values. Enzymes typically act under milder conditions of temperature and pH than non-enzyme chemical catalysts. Zymogens are the inactive precursors of enzyme. Nucleophilic groups can catalyze reactions through the transient formation of covalent bonds with the substrate. Transition state stabilization can significantly increase the activation energy for a reaction.
Enzymes are specific, they match with a specific and particular reactant during the reactions, the enzyme changes shape and cannot be used again true or false
Below which is false about enzyme and catalysis? O Catalytic residues interact with substrates and help substrates reach "transition state". Catalytic residues may be far away from each other in the protein sequence. Enzymes go through changes when binding to substrates, but the changes are always temporary. During catalysis, enzymes never form covalent bonds with substrates. O During catalysis, enzymes may serve as an acid or a base.
Enzymes can: make exothermic reactions into endothermic reactions. change the direction of a biochemical pathway. contain multiple subunits and be very complex (e.g., ATP synthase) be broken down into monosaccharide subunits. None of these.
The following speaks true of metabolism except. 1. Property consistent to all organisms ranging from prokaryotes to the human organism 2. Sum total reactions in the body 3.Metabolic rections contribute to homeostasis by harvesting chemical energy 4.Metabolic reactions are entirely exergonic reactions
One enzyme can catalyze many different reactions as long as the specific substrates for those reactions are readily available. True False