Bio Chap 3What are the properties of carbon skeletons? The term amino acid consists of what? It consists of an amino group and a carboxyl group. A molecule with the formula C6 H12 O6 is. Which of the following would bind to a sweet receptor most tightly?
Bio Chap 3 Flashcards | Quizlet
Which one of these is an amino group? Which of these is a phosphate group? Which of these is a hydroxyl group? Which of these is a carboxyl group? Which of these functional groups is characteristic of alcohol? Which of the functional groups behaves as a base? Which of these groups is characteristic of thiols? Which of these groups plays a major role in energy transfer? Which of these is a carbonyl group? Which of these functional groups is characteristic of a ketone? What is another name for a condensation reaction?
Which of these functional groups behaves as an acid? What is the name of the process during which a bond between two monomers is broken? Polymers that contain sugars May store hereditary information, may store energy, and may protect cells. Which of these is a source of lactose? Which of these is a polysaccharide? The presence of many C-C and C-H bonds causes fats to be Both a and b. Both b and c. The blue part of this molecule is derived from Triglycerides vary with respect to the number of All of the above.
A food company hydrogenated a barrel of fat. Both a and d. The most unsaturated fats have What do DNA, proteins, and fats have in common? They contain carbonyl groups. What do fats, steroids, and waxes have in common?
Both a and c. Haxton told one of his students, "To move in the bloodstream, fats need the help of phospholipids. You have it backwards. Fats help phospholipids to travel. Fats are too polar to travel alone in water.
Nonpolar molecules aren't compatible with water. Fats are small enough to travel easily without help. Help comes from cholesterol, not phospholipids. Which of these is NOT a lipid? Which of these is rich in unsaturated fats? All of cholesterol's effects cause the body harm. Which of these does NOT contain a structural protein?
What type of bond joins the monomers in a protein's primary structure? Which of these illustrates the secondary structure of a protein? If a DNA double helix is nucleotide pairs long and contains 25 adenine bases, how many guanine bases does it contain? Which element is closely associated with the field of organic chemistry? Choose the pair of terms that completes this sentence: Although the structures of the functional groups important to life hydroxyl, carbonyl, carboxyl, amino, and phosphate vary in chemical structure, they share one thing in common: Consider the figure shown below.
What one characteristic is shared by sucrose and maltose? They all contain fructose. They are all disaccharides. Then, enzymes are used to convert some of this product to fructose. Double bonds are present in the majority of the fats of which of the following foods? Which of the following types of fat increases heart attack risk the most?
Some athletes use anabolic steroids to build their body mass. Why is this considered a problematic practice, especially in adolescents? Anabolic steroids stimulate the body's production of normal sex hormones. Anabolic steroids reduce depression. Anabolic steroids can prevent bone growth. Anabolic steroids reduce cancer risk. Proteins are an important class of molecules because of the functions they perform.
The ovalbumin in egg white can be classified as which type of protein? Which condition is irrelevant, to some extent, to the maintenance of protein structure in your body? Information dictating the primary sequence of a polypeptide is permanently maintained within a cell in which of the following forms? What does the term amino acid signify about the structure of the molecule?
It consists of an amino group only. It consists of an amino group and a carbonyl group. It consists of an amino group and a carboxyl group. It consists of a carboxyl group only. Lactose is a disaccharide two monosaccharides joined together.
To metabolize lactose, individuals require an enzyme known as lactase. What is true about this reaction? The reaction hydrolyzes the sugar. The reaction causes reactants to be formed. The reaction causes bloating in individuals who have the enzyme. The reaction dehydrates the sugar. Generally, animals cannot digest the linkages between the glucose molecules in cellulose. How then do cows get enough nutrients from eating grass? They have to eat a lot of grass.
Cows make an enzyme in their saliva that hydrolyzes cellulose. Cows and other herbivores are exceptions and make some cellulose-digesting enzymes in their digestive tracts. Microorganisms in their digestive tracts hydrolyze the cellulose to glucose.
Cholesterol belongs to which class of molecules? How many different kinds of amino acids are there in most proteins? Lactase deficiency is more common in Asian, Native American, Mediterranean and some African populations than it is among people with northern or western European ancestry. How would you explain why this is so? Asian, Native American, Mediterranean, and some African populations suffer from lactase deficiency because they have low levels of lactose in their diet.
Although most mammals, including humans, are not able to digest the milk sugar, lactose, after infancy, the ancestors of northern and western Europeans relied on dairy products as an important part of their food supply.
When other food sources were in low supply, mutations that allowed the expression of the enzyme lactase to persist past childhood conveyed an advantage to adults who were able to include dairy products in their diet. Although most mammals, including humans, are able to digest the milk sugar, lactose, after infancy, Asian, Native American, Mediterranean, and some African populations lost this ability through mutations about years ago.
Asian, Native American, Mediterranean, and some African populations suffer from lactase deficiency because they have high levels of lactose in their diet.