Answer:
Explanation:
The purpose of any leavener is to produce the gas that makes bread rise. Yeast does this by feeding on the sugars in flour, and expelling carbon dioxide in the process.
While there are about 160 known species of yeast, Saccharomyces cerevisiae, commonly known as baker's yeast, is the one most often used in the kitchen. Yeast is tiny: Just one gram holds about 25 billion cells. That amount of fungi can churn out a significant amount of carbon dioxide, provided it has the simple sugars it uses as food. Fortunately, yeast can use its own enzymes to break down more complex sugars—like the granulated sugar in the activity below—into a form that it can consume.
Make a yeast-air balloon to get a better idea of what yeast can do.
Recipe Conversions
CAUTION
Kids, please don’t try this at home without the help of an adult.
Did You Know?
Yeast also produces alcohol as it feeds, which is why it is an important ingredient in making beer.
Did You Know?
In 1857, Louis Pasteur discovered that yeast is a living organism whose activity causes fermentation.
Answer:
Washing will help remove bacteria, including E. coli, from the surface of fruit and vegetables. Most of the bacteria will be in the soil attached to the produce. ... It is always advisable to wash all fruit and vegetables before you eat them to ensure they are clean and to help remove bacteria from the outside.
<span>Wildfires are a likely abiotic limiting factor for these plants. Drought also affects them. A lot of times these kinds of plants can be found in regions that have a Mediterranean climate. The production of essential oils is used as a defense mechanism.</span>
Answer:
False
Explanation:
Restriction enzymes, also called restriction endonucleases, are enzymes found in bacteria that cut DNA. They recognise target sequences and cut DNA at or near these sequences. These sequences are called restriction sites.
They act as a defense mechanism against invading pathogens. However, they are routinely used in molecular biology labs to perform DNA technologies such as genetic engineering.
Answer:
The correct answer is option B.
Explanation:
Transcription refers to a phenomenon, which occurs in the nucleus of a cell that comprises the production of messenger RNA from a DNA molecule. The phenomenon is mediated with the help of an enzyme RNA polymerase. The mRNA or messenger RNA carries genetic information or the genetic codes, which is further utilized in the production of proteins via the process of translation.
The genetic information is aligned in the form of codons that predicts the amino acids, and thus predicts the protein, which will be produced. Thus, an error at the time of transcription signifies a variation in base pairs, which further means a change in the codons, and subsequently different amino acids that would eventually lead to a formation of an incorrect protein.