Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 24, Problem 33CTQ
Historically, artisanal breads were produced by capturing wild yeasts from the air. Prior to the development of modern yeast strains, the production of artisanal breads was long and laborious because many batches of dough ended up being discarded. Can you explain this fact?
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
Explain the impacts that the following variables have on yeast fermentation:
a.Temperature
b. Food source complexity
c.pH
You are curious to know whether the amount of sugar (food) provided to yeast impacts how much waste gas is produced. To help answer this question, you set up an experiment similar to the one you performed in lab. However, this time, you use four flasks instead of two.
In Flask 1 you add 1/4 teaspoon of sugar, in Flask 2 you add 1/2 teaspoon of sugar, in Flask 3 you add 1 teaspoon of sugar, and in Flask 4 you add no sugar.
You add 1/2 teaspoon of yeast ("unlabeled sample") and 20 mL of lukewarm water to each flask.
You place a balloon on top of each flask. After 30 minutes, you measure the circumference of each balloon to determine how much gas was produced
efer back to this experiment to answer questions 1-7.
________________
A) What were the treatment groups in this experiment?
B) Which group was the control group?
Which sugar is the yeast least able to metabolize?
Chapter 24 Solutions
Biology 2e
Ch. 24 - Figure 24.14 Which of the following statements is...Ch. 24 - Figure 24.17 Which of the following statements is...Ch. 24 - Figure 24.21 If symbiotic fungi are absent from...Ch. 24 - Which polysaccharide is usually found in the cell...Ch. 24 - Which of these organelles is not found in a fungal...Ch. 24 - The wall dividing individual cells in a fungal...Ch. 24 - During sexual reproduction, a homothallic mycelium...Ch. 24 - The life cycles of perfect fungi are most similar...Ch. 24 - The most primitive phylum of fungi is the...Ch. 24 - Members of which phylum produce a club shaped...
Ch. 24 - Members of which phylum establish a successful...Ch. 24 - The fungi that do not reproduce sexually used to...Ch. 24 - A scientist discovers a new species of fungus that...Ch. 24 - What term describes the close association of a...Ch. 24 - Why are fungi important decomposers? They produce...Ch. 24 - Consider an ecosystem where all the fungi not...Ch. 24 - A fungus that climbs up a tree reaching higher...Ch. 24 - A fungal infection that affects nails and skin is...Ch. 24 - The targets for anti-fungal drugs are much more...Ch. 24 - Yeast is a facultative anaerobe. This means that...Ch. 24 - The advantage of yeast cells over bacterial cells...Ch. 24 - Why are fungal insecticides an attractive...Ch. 24 - What are the evolutionary advantages for an...Ch. 24 - Compare plants, animals, and fungi, considering...Ch. 24 - Why is the large surface area of the mycelium...Ch. 24 - What is the advantage for a basidiomycete to...Ch. 24 - For each of the four groups of perfect fungi...Ch. 24 - Why does protection from light actually benefit...Ch. 24 - Ambrosia bark beetles carry Amb/os/e//a fungal...Ch. 24 - Ecologists often attempt to introduce new plants...Ch. 24 - Why can superficial mycoses in humans lead to...Ch. 24 - Explain how the Red Queen Hypothesis describes the...Ch. 24 - Historically, artisanal breads were produced by...Ch. 24 - How would treating an area of a forest with a...
Additional Science Textbook Solutions
Find more solutions based on key concepts
Solve part (b) of Example 6.6 using ac=v2/r.
College Physics
The following diagram illustrates passive and active transport across a plasma membrane. Use it to answer quest...
Study Guide for Campbell Biology
Police Captain Jeffers has suffered a myocardial infarction. a. Explain to his (nonmedically oriented) family w...
Human Physiology: An Integrated Approach (8th Edition)
In Drosophila, Dichaete (D) is a mutation on chromosome III with a dominant effect on wing shape. It is lethal ...
Concepts of Genetics (12th Edition)
20. Neurospora with the genotype form tetrads in the following frequencies:
What is the distance between the g...
Genetic Analysis: An Integrated Approach (2nd Edition)
Define histology.
Fundamentals of Anatomy & Physiology Plus Mastering A&P with eText - Access Card Package (10th Edition) (New A&P Titles by Ric Martini and Judi Nath)
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
- Your next-door neighbor has donated $100 in support of cancer research and is horrified to learn that her money is being spent on studying brewer’s yeast. how could you put her mind at ease?arrow_forwardExplain the graph below. Which group likely had more substrates (sugar and nitrogen)? Describe the growth profiles and give physiological explanations. (ie. what is happening at 20 min? 40 min?) Why do the two profiles differ?arrow_forwardYeast cells are added to sterilized corn mash in large industrial fermenters to produce ethanol, which is added to gasoline. It is necessary to install cooling systems around the fermenters because heat is released at each step of the fermentation pathway heat is absorbed by yeast as they carry on fermentation cooler temperatures decrease the production of the CO2 by-product ethanol is less toxic to yeast at cooler temperaturesarrow_forward
- Biofuels offer an attractive alternative to fuel, but there are concerns about the resources and logistics of producing mass amounts of corn. Which organism is being considered as an alternative source of biofuel? A) cyanobacteria B) Escherichia coli C) yeast D) algaearrow_forwardThe data are plotted and we see this graph: 1 2 3 Time (weeks) Yeast A 0% Yeast A 5% Yeast A 10% Yeast B O% Yeast B 5% Yeast B 10% 4. Based on the graph above, which type of yeast is most effective at producing alcohol? Did you expect this - why or why not? (2) % ABVarrow_forwardMost ecosystems on Earth rely on sunlight as the primary energy source for the synthesis of organic compounds that living organisms need. Sunlight does not penetrate deep enough in the ocean to provide energy for organisms living near hydrothermal vents. How can these densely populated communities survive without energy from the sun? A. chemoheterotrophic bacteria convert organic compounds into carbon dioxide which is used by other organisms as an energy source B. chemoautotrophic bacteria harvest chemical energy from hydrogen sulfide and then provide the basis of food for the vent communities C. chemoheterotrophic bacteria harvest chemical energy from hydrogen sulfide and then provide the basis of food for the vent communities D. chemoautotrophic bacteria fix nitrogen which then is used as a source of energy for other organismsarrow_forward
- Climate monitoring demonstrates a continued increase in carbon dioxide concentration in the atmosphere. Most scientists agree that this increased carbon dioxide will also lead to higher temperatures. a) How might future climate change affect metabolic pathways in plant populations? Explain. b) Biotechnologists are currently looking for ways to maintain food sources in climbing heat and carbon dioxide levels, particularly in developing countries. One such endeavor is to convert rice from a C3 to a C4 pathway to increase its photosynthetic efficiency. Will this actually increase its efficiency? Explain.arrow_forwardWhy is yeast so important?arrow_forwardIn the early 1800s, potatoes became the main food staple for the people of Ireland. In 1845, a fungus native to South America, Phytophthora infestans, began to infect potato plants, causing potato blight and making the tubers inedible. Over the next several years, most of the potato plants in the country were destroyed by this invasive species. Which of the following statements correctly explains why the Irish potato famine occurred? A - The arrival of ships from South America led to human introduction of the disease. B - A drought across Ireland in 1844 led to more damaged potato plants that were susceptible to infection. C - An increase in trade with other European countries led to the introduction of plants that were already infected with the fungus. D - Ireland’s climate became closer to that of South America, which allowed the fungus to infect potato plants and reproduce.arrow_forward
- Pichia pastoris was inoculated at a concentration of 1.0 kg/m3 and cultivated in a medium containing glycerol as a carbon source. The following table shows the evolution of cell concentration over the time of cultivation. time (h) 0 1 2 3 5 10 15 20 25 30 40 50 Cx (kg/m3) 1,0 1,0 1,0 1,1 1,7 4,1 8,3 18,2 36,2 64,3 86,1 98,4 What is the maximum specific growth rate of these cells (h-1)?arrow_forwardWhich of the following processes is described in the reaction shown in the picture? a.denitrification b.nitrification c.nitrogen fixation d.assimilationarrow_forwardAs a biologist, how could you use yeast to bioremediate? What would you do to make the yeast work best?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Intro to Food Microbiology; Author: A professor pressing record;https://www.youtube.com/watch?v=vg8fSmk0dVU;License: Standard youtube license