Card 141
Question
Which general class of tannins contain catechin or epicatechin as its monomeric units? hydrolyzable tannins, condensed tannins, Non condensed tannins, phytotannins
Answer
Condensed tannins
Food Chemistry
Discover Food Chemistry: 945 flashcards with questions and answers.
- Subject
- Sciences / Chemistry
- Language of creation
- English
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Cards in this set
Card 142
Question
Which of the following statement(s) is/are true regarding Food/organic acids: A.they are weak acids, B.they have good buffering capacity, C.can buffer at multiple pHs, or D.All of the above?
Answer
D. All of the Above
Card 143
Question
Which of the following food fats contain the highest proportion of saturated fatty acids: A.lard, B.beef tallow, C.butter fat, or D.coconut oil?
Answer
D. coconut oil
Card 144
Question
Which of the following foods contain the highest content of water: A.fresh carrots, B.fresh tomatoes, C.whole milk, or D.fresh celery?
Answer
D. fresh celery (contains 94.1% water).whole milk contains 87.2% water, Carrots contain 88.2% water, and fresh tomatoes contain 93.5% water
Card 145
Question
What is the maximum pH at which sorbic acid is effective as a preservative in foods:A.3.5, B.4.5, C.5.5, or D.6.5?
Answer
D.6.5
Card 146
Question
Water A) Is the major component of most foods. B) Controls shelf-life or storage capability C) Regulates chemical and microbiological reactions D) All of the above
Answer
D) All of the Above
Card 147
Question
Which of the following is not a major mineral? Ca, Fe, K, S, Na
Answer
Fe
Card 148
Question
Stability of eggs not dependent on: Protein conc, pH, H2O addition, presence of sugar
Answer
H2O addition
Card 149
Question
Which will be coldest at its freezing point: 1M dispersion of amylose, 1M solution of NaCl, distilled water, or 1M solution of sucrose?
Answer
NaCl (it dissociated to a 2M solution)
Card 150
Question
Which of the following elements is found in a molecule of the pigment xanthophyll but not in a molecule of betacarotene: nitrogen, oxygen, hydrogen, carbon
Answer
Oxygen (this is the difference between betacarotene and retinol/al)
Card 151
Question
Chlorophyll would be an initiator of what type of oxidation pathway? Enzymatic, photosynthesized, autoxidation, hydrolytic
Answer
Photosynthesized
Card 152
Question
Which of the following oils would become rancid fastest? Canola, soybean, or olive
Answer
Soybean
Card 153
Question
Glucuronic acid is an example of: fructose metabolite, sugar acid, sugar alcohol, glucose metabolite
Answer
Sugar acid
Card 154
Question
Which fatty acid has the longest hydrocarbon chain? Hexadecanoic acid, tetracosinoic acid, octadecanoic acid, Triacontanoic acid
Answer
Triacontanoic acid (30C)
Card 155
Question
Will lipid oxidation be higher at a water activity of 0.05 or 0.5?
Answer
0.05
Card 156
Question
What percent of the O-H bond in a water molecule is ionic character?
Answer
0.4
Card 157
Question
How many amino acids are found in one turn of an alpha helix in DNA?
Answer
3.6
Card 158
Question
How many water molcules can one water molecule bind to?
Answer
4
Card 159
Question
What is the coordination number of stable ice-I?
Answer
4
Card 160
Question
How many C (carbons) are in capric acid?
Answer
10
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