EBK BIOLOGY TODAY AND TOMORROW WITHOUT
5th Edition
ISBN: 9781305724747
Author: STARR
Publisher: CENGAGE LEARNING - CONSIGNMENT
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Question
Chapter 4, Problem 2DID
Summary Introduction
To determine: The number of enzymes which functions optimally at a pH lower than 5 and how many retains significant function at pH 5.
Concept introduction: Enzymes are protein molecules that enhance the
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
Extremophiles are microorganisms that can survive and proliferate in extreme environments. One group of such microorganisms are lithotrophs. These are found deep
beneath the Earth's surface, living on rocks under anaerobic conditions and surviving on CO2 as their sole source of
carbon.
Imagine that you are studying a newly discovered lithotroph and are trying to determine what it uses as a source of electrons for reducing CO2 and for producing energy.
Which one of the following conditions must be met for a molecule to serve as a useful electron donor?
Oxidation of the molecule occurs with a decrease in free energy.
Oxidation of the molecule occurs with an increase in free energy.
Reduction of the molecule occurs with a decrease in free energy.
O Reduction of the molecule occurs with an increase in free energy.
If a toxin blocked the first compound of the Electron Transport Chain what would be the effect on an organism?
Rotenone is a broad-spectrum insecticide and that inhibits the electron transport chain. Why might it be toxic tohumans?
Chapter 4 Solutions
EBK BIOLOGY TODAY AND TOMORROW WITHOUT
Ch. 4 - Figure 4.5 Energy inputs and outputs in chemical...Ch. 4 - Figure 4.10 Enzymes, temperature, and pH. Each...Ch. 4 - Prob. 3FIOCh. 4 - Prob. 4FIOCh. 4 - The genus Ferroplasma consists of a few species of...Ch. 4 - Prob. 2DIDCh. 4 - Prob. 3DIDCh. 4 - Prob. 1SQCh. 4 - Prob. 2SQCh. 4 - Prob. 3SQ
Ch. 4 - Prob. 4SQCh. 4 - Prob. 5SQCh. 4 - Prob. 6SQCh. 4 - Prob. 7SQCh. 4 - Prob. 8SQCh. 4 - Ions or molecules tend to diffuse from a region...Ch. 4 - Prob. 10SQCh. 4 - Prob. 11SQCh. 4 - Prob. 12SQCh. 4 - A transport protein requires ATP to pump sodium...Ch. 4 - Prob. 14SQCh. 4 - Prob. 15SQCh. 4 - Prob. 1CTCh. 4 - Water molecules tend to diffuse in response to...Ch. 4 - Dixie Bee wanted to make JELL-O shots for her next...Ch. 4 - The enzyme trypsin is sold as a dietary enzyme...Ch. 4 - Prob. 5CT
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- The genus Ferroplasma consists of a few species of acid-loving archaea. One species, F. acidarmanus, was discovered to be the main component of slime streamers (a type of biofilm) deep inside an abandoned California copper mine (Figure 4.11A). F. acidarmanus cells use an ancient energy-harvesting pathway that combines oxygen with ironsulfur compounds in minerals such as pyrite. This reaction dissolves the minerals, so groundwater that seeps into the mine ends up with extremely high concentrations of metal ions such as copper, zinc, cadmium, and arsenic. The reaction also produces sulfuric acid, which lowers the pH of the water around the cells to zero. Despite living in an environment with a composition similar to hot battery acid, F. acidarmanus cells maintain their internal pH at a cozy 5.0. Thus, researchers investigating Ferroplasma metabolic enzymes were surprised to discover that most of the cells enzymes function best at very low pH (Figure 4.11B). A. Deep inside one of the most toxic sites in the United States: Iron Mountain Mine, in California. The water in this stream, which is about 1 meter (3 feet) wide in this photo, is hot (around 40C, or 104F), heavily laden with arsenic and other toxic metals, and has a pH of zero. Slime streamers growing in it are a biofilm dominated by a species of archaea, Ferroplasma acidarmanus. B. pH profiles of four enzymes isolated from F. acidarmus. Researchers had expected these enzymes to function best at the cells cytoplasmic pH (5.0). What does the dashed line signify?arrow_forwardWatermelon snow” in Antarctica is caused by a species of photosynthetic green algae that thrives in subzero temperatures (Chlamydomonas nivalis). These algae are also found in high altitude year-round snowfields. In both locations, UV light levels tend to be high. Based on what you learned this week, propose an explanation for why this photosynthetic alga appears reddish-pink.arrow_forwardAutotrophic organisms such as plants, algae, blue green alga, and chemosynthetic bacteria are rarely mentioned in pathology because they do not cause disease in other types of living things. What is it about the metabolic machinery of autotrophs that makes them unlikely to cause disease in people?arrow_forward
- During aerobic respiration in eukaryotes, which substrate molecules provide the oxygen atoms that end up in product water molecules? H2S molecules only H2O and C6H12O6 molecules only CO2 molecules only C6H12O6 and CO2 molecules only O2 molecules onlyarrow_forwardAutotrophs harvest energy directly from the environment and store it in the form of sugars and other carbohydrate. They and all other organisms use energy stored in sugars to power various endergonic reactions that sustain life. Identify the two cellular process responsible for products described in the figure. Explain the role of each product listed in the processes. A prolonged drought with record-breaking temperatures occurs in the Pacific Northwest. Predict the impact on the cellular processes described in the figure. Justify your response.arrow_forwardSome friends are trying to make wine in their basement. They've added yeast (which is a facultative anaerobe - it can perform both aerobic respiration and fermentation) to a sweet grape juice mixture and have allowed the yeast to grow. After several days they find that sugar levels in the grape juice have dropped, but there's no alcohol in the mixture. The most likely explanation is that the mixture needs less oxygen, because yeast only produce alcohol in the absence of oxygen the mixture needs less sugar, because high sugar concentrations prevent fermentation the mixture needs more sugar, because yeast need a lot of energy before they can begin to produce alcohol the yeast used the alcohol as a carbon source the mixture needs more oxygen, because yeast need oxygen to break down sugar and get enough energy to produce alcoholarrow_forward
- While bacteria can meet their nutrient needs and survive on acetic acid as a sole carbon source, human beings cannot. Provide a plausible explanation for this limitation in human beings.arrow_forwardWhich of the following sequence of proteins and the corresponding number of pumped protons is correct during the electron transport chain from NADH? Ubiquinone → Complex III: 4 H+ → Cytochrome c→ Complex IV: 2 Ubiquinone Complex III: 2 H+→ Cytochrome c→ Complex IV:2 Ubiquinone → Cytochrome c→ Complex III: 4 H+ → Complex IV: 2 D. Complex 1: 4 H+ → Ubiquinone → Complex III: 2H+ → Complex IV: 2 H+ → Cytochrome c A. Complex I: 4 H+ → B. Complex I: 4 H+ C. Complex I: 4 H+arrow_forwardOrganisms ATP NADH NADPH FADH2 Ethanol 1 20 100 0 0 50 2 350 400 0 100 1 3 500 410 200 100 1 Three organisms were tested biochemically for their production of energy, and various compounds were measured in each organism. The amounts found are shown in relative units. Based on this data, identify what kind of oganisms each is and why.arrow_forward
- Many plastic materials are organic polymers that contain carbon and hydrogen. The oxidation of these plastics in air to form carbon dioxide and water is a spontaneous process; however, plastic materials tend to persist in the environment. Explain.arrow_forwardWhich of the following organic molecules would have the greatest potential for supporting ATP production in a eukaryotic obligate aerobe under transiently anoxic conditions? O glucose O sucrose O glycogen O palmitate O alaninearrow_forwardMatch the following characteristics to either (a) autotrophsor (b) chemoheterotrophs:Many microorganisms in this group are infectious.Many microorganisms in this group can carry out pho-tosynthesis.Members of this group usually do not cause disease.Members of this group carry out the same metabolicprocesses as humans.Members of this group break down organic compoundsto obtain energy.Members of this group synthesize organic compoundsto store energy.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Biology Today and Tomorrow without Physiology (Mi...BiologyISBN:9781305117396Author:Cecie Starr, Christine Evers, Lisa StarrPublisher:Cengage Learning
Biology Today and Tomorrow without Physiology (Mi...
Biology
ISBN:9781305117396
Author:Cecie Starr, Christine Evers, Lisa Starr
Publisher:Cengage Learning
Explore Terrestrial Habitats - Types of Habitats for Children; Author: Smile and Learn - English;https://www.youtube.com/watch?v=vv1indKgOHQ;License: Standard youtube license