if a dna sample were composed of 10% thymine, what would be the percentage of guanine?

if a dna sample were composed of 10% thymine, what would be the percentage of guanine?


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Asked by 2 years ago
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Molecules with which functional groups may form polymers via dehydration reactions?either hydroxyl or carboxyl groups
Which of these molecules is not formed by dehydration reactions?fatty acids
In animal metabolism, most of the monomers released by digestion of food macromolecules are metabolized to provide energy. Only a small portion of these monomers are used for synthesis of new macromolecules. The net result is thatwater is consumed by animal metabolism.
Which of the following is not a polymer?glucose
What is the chemical reaction mechanism by which cells make polymers from monomers?dehydration reactions
How many molecules of water are needed to completely hydrolyze a polymer that is 11 monomers long?10
Which of the following polymers contain nitrogen?chitin
The molecular formula for glucose is C6H12O6. What would be the molecular formula for a molecule made by linking three glucose molecules together by dehydration reactions?C18H32O16
The enzyme amylase can break glycosidic linkages between glucose monomers only if the monomers are the form. Which of the following could amylase break down?glycogen
On food packages, to what does the term insoluble fiber refer?cellulose
A molecule with the chemical formula C6H12O6 is probably acarbohydrate and monosaccharide only.
Lactose, a sugar in milk, is composed of one glucose molecule joined by a glycosidic linkage to one galactose molecule. How is lactose classified?as a disaccharide
All of the following are polysaccharides exceptlactose.
Which of the following is true of both starch and cellulose?They are both polymers of glucose.
Which of the following is true of cellulose?It is a major structural component of plant cell walls.
Which of the following statements concerning saturated fats is not true?They have multiple double bonds in the carbon chains of their fatty acids.
A molecule with the formula C18H36O2 is probably afatty acid.
Which of the following statements is true for the class of biological molecules known as lipids?They are insoluble in water.
The label on a container of margarine lists "hydrogenated vegetable oil" as the major ingredient. What is the result of adding hydrogens to vegetable oil?The hydrogenated vegetable oil stays solid at room temperature.
Which of the following is true regarding saturated fatty acids?They are the principal molecules in lard and butter.
Large organic molecules are usually assembled by polymerization of a few kinds of simple subunits. Which of the following is an exception to this statement?a steroid
Why are human sex hormones considered to be lipids?They are not soluble in water.
All of the following contain amino acids exceptcholesterol.
The bonding of two amino acid molecules to form a larger molecule requiresthe release of a water molecule.
There are 20 different amino acids. What makes one amino acid different from another?different side chains (R groups) attached to an carbon
Polysaccharides, triacylglycerides, and proteins are similar in that theyare synthesized from subunits by dehydration reactions.
What aspects of protein structure are stabilized or assisted by hydrogen bonds?secondary, tertiary, and quaternary structures, but not primary structure
How many different kinds of polypeptides, each composed of 12 amino acids, could be synthesized using the 20 common amino acids?2012
Which bonds are created during the formation of the primary structure of a protein?peptide bonds
What maintains the secondary structure of a protein?hydrogen bonds between the amino group of one peptide bond and the carboxyl group of another peptide bond
Which level of protein structure do the helix and the pleated sheet represent?secondary
The tertiary structure of a protein is theunique three-dimensional shape of the fully folded polypeptide. three-dimensional shape?
What type of covalent bond between amino acid side chains (R groups) functions in maintaining a polypeptide's specific three-dimensional shape?disulfide bond
At which level of protein structure are interactions between the side chains (R groups) most important?tertiary
The R group or side chain of the amino acid serine is -CH2-OH. The R group or side chain of the amino acid leucine is -CH2-CH-(CH3)2. Where would you expect to find these amino acids in a globular protein in aqueous solution?Leucine would be in the interior, and serine would be on the exterior of the globular protein.
What methods may be used to elucidate the structures of purified proteins?both X-ray crystallography and NMR spectroscopy
If cells are grown in a medium containing radioactive 35S, which of these molecules will be labeled?proteins
What is the term used for a protein molecule that assists in the proper folding of other proteins?chaperonin
DNAase is an enzyme that catalyzes the hydrolysis of the covalent bonds that join nucleotides together. What would first happen to DNA molecules treated with DNAase?The phosphodiester bonds between deoxyribose sugars would be broken.
Which of the following statements about the 5' end of a polynucleotide strand of DNA is correct?The 5' end has a phosphate group attached to the number 5 carbon of ribose.
One of the primary functions of RNA molecules is tofunction in the synthesis of proteins.
Which of the following descriptions best fits the class of molecules known as nucleotides?a nitrogenous base, a phosphate group, and a pentose sugar
If a DNA sample were composed of 10% thymine, what would be the percentage of guanine?40
A double-stranded DNA molecule contains a total of 120 purines and 120 pyrimidines. This DNA molecule could be composed of120 thymine and 120 adenine molecules.
The difference between the sugar in DNA and the sugar in RNA is that the sugar in DNAcontains one less oxygen atom.
If one strand of a DNA molecule has the sequence of bases 5'ATTGCA3', the other complementary strand would have the sequence5'TGCAAT3'.
What is the structural feature that allows DNA to replicate?complementary pairing of the nitrogenous bases
A new organism is discovered in the forests of Costa Rica. Scientists there determine that the polypeptide sequence of hemoglobin from the new organism has 72 amino acid differences from humans, 65 differences from a gibbon, 49 differences from a rat, and 5 differences from a frog. These data suggest that the new organismis more closely related to frogs than to humans.
If cells are grown in a medium containing radioactive 32P-labeled phosphate, which of these molecules will be labeled?both phospholipids and nucleic acids
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