Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 9.5, Problem 3R
Summary Introduction
To review:
The metabolic conversion of polysaccharides and proteins into lipids.
Introduction:
A burger contains all the three essential nutrients, carbohydrates, proteins, and fats. The body’s energy supply is fulfilled first by the catabolism of carbohydrates, followed by fats, and lastly by proteins. Though the proteins and carbohydrates to some extent are good for the health, but both these nutrients may end up as fats. This happens with the transfer of carbon atoms from the carbohydrates and proteins to the lipids.
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If both cellulose and starch are just polymers of glucose, why can we only get glucose from starch, while cellulose cannot be digested by our bodies? What is missing for cellulose?
Which is common to glucose, deoxyribose, ribose, galactose, and fructose?
They are monosaccharides.
They are disaccharides.
They have 4 carbons in their molecular structure
They have 5 carbons in their molecular structure
Why do lipids contain more energy than carbohydrates?
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Life: The Science of Biology
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- Which of the following is the carbohydrate, the fatty acid, the amino acid, and the polypeptide? a. +NH3CHRCOO b. C6H12O6 c. (glycine)20 d. CH3(CH2)16COOHarrow_forwardHow can you distinguish a pentose sugar from a hexose sugar? a disaccharide from a sterol? an amino acid from a monosaccharide? a phospholipid from a triacylglycerol? a protein from a polysaccharide? a nucleic acid from a protein?arrow_forwardDixie Bee wanted to make JELL-O shots for her next party, but felt guilty about encouraging her guests to consume alcohol. She tried to compensate for the toxicity of the alcohol by adding pieces of healthy fresh pineapple to the shots, but when she did, the JELL-O never solidified. What happened? Hint: JELL-O is mainly sugar and a gelatinous mixture of proteins.arrow_forward
- _______ are to protein as ______ are to nucleic acids. a. Sugars; lipids c. Amino acids; hydrogen bonds b. Sugars; proteins d. Amino acids; nucleotidesarrow_forwardIn your own words, describe the relationship between nucleic acids, proteins, and carbohydrates.arrow_forwardSucrose is composed of a molecule of glucose and a molecules of fructose. What type of carbohydrate is sucrose? Group of answer choices a, polysaccharide b, disaccharide c, monosaccharide d, fruit sugararrow_forward
- Which one of the following statements about lipids is correct?a. Saturated fats contain many double bonds.b. Unsaturated fats do not have double bonds.c. Fatty acids contain 9 kilocalories per gram.d. Steroids consist of chain structure molecules.arrow_forwardThe monomer unit of polysaccharides such as starch and cellulose is a. fructose c. ribose b. glucose d. lactosearrow_forwardWhich of the following statements is TRUE? A) Monosaccharides are the building blocks of polypeptides.B) Nucleotides are the building blocks of saccharides.C) Carbohydrates are water soluble and responsible for short term energy storage.D) Amino acids are made of peptides.E) Fatty acids are responsible for DNA replicationarrow_forward
- Why are lipids more energy-dense than carbohydrates?arrow_forwardA triglyceride consists of (a) glycerol plus three fatty acids, (b) a sugar-phosphate backbone to which two amino groups are attached, (c) two to several hexoses, (d) amino acids that have been thoroughly saturated with hydrogen.arrow_forwardCarbon chains are principal features for both carbohydrates and lipids. What is the primary difference between these two types of macromolecules?* Please choose one correct answer only. A. Lipids always have longer carbon chains than carbohydrates B. Lipids provide energy, but carbohydrates cannot C. Carbohydrates cannot form rings like lipids can D. Carbohydrates form ring structures, lipids form long chainsarrow_forward
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