This is a space-filling model of _____.
a lipid
a protein
glycogen
the nucleotide adenine
a lipid
Lipids have a hydrophobic tail and hydrophilic head joined by a glycerol molecule.
Which statement is CORRECT about hydrophobic interactions?
They do not follow the Second Law of Thermodynamics.
They are important in the generation of order in biological organisms.
They occur between water molecules.
During hydrophobic interactions, ent
They are important in the generation of order in biological organisms.
Biological fuel molecules are made up entirely of _____.
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Answer choicescarbon and hydrogenoxygen and hydrogencarbon, nitrogen, oxygen, and hydrogencarbo
carbon, oxygen, and hydrogen
These three elements form the three basic sugars which are polymerized to form biological fuels.
This figure shows the energy of a van der Waals interaction as two atoms approach each other. The energy increases above zero when _____.
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Answer choices
two atoms are repelled from each other
The energy rises rapidly under strong repulsive forces between atoms.
The initial stage of glucose metabolism, fatty acid synthesis, and protein synthesis all occur in the _____ of a eukaryotic cell.
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Answer choicesrough en
cytoplasm
The cytoplasm is the location of a wide array of chemical processes, including all three named in the question.
Which of the following is NOT found in a molecule of DNA?
thymine
guanine
adenine
uracil
uracil
You prepare a solution with a proton concentration of 8.0 x 10�5 M. What is the concentration of hydroxide ion [OH�] in the solution?
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8.0 x 10�12 M
1.25
1.25 x 10�10 M
1.0
10^-14/8.0
10^5
Which of the following statements is true of lipids but not true of proteins or nucleic acids?
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They have a typical molecular weight of 1300 g mol-1.
The
They have a typical molecular weight of 1300 g mol-1.
Ribosomes are made up of _____.
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fatty acids and RNA
fatty acids and carbohydrates
proteins and carbohydrates
proteins and RNA
proteins and RNA
Ribosomes translate the genetic information stored in mRNA into the proteins needed by the cell.
This is the structure of glycogen. The letter G represents a _____.
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protein
galactose monomer
glucose monomer
lipid
protein
This protein provides the site for the initial glucose monomer to bind and begin polymerization.
Which of the following would NOT be part of a complex carrying out the process of translation?
DNA
Which of the following statements is TRUE of proteins but NOT TRUE of lipids?
They are made up of glucose.
They are made of four monomers designated A, C, G, T.
One end is hydrophobic and the other is hydrophilic.
They are polymers.
they are polymers
The phenomenon in which individual cells express only certain genes contained in their genome is known as _____.
judicious genetic expression
partial genomic expression
functional expression
selective expression
selective expression
This figure shows the energy of a van der Waals interaction as two atoms approach each other. The energy increases above zero when _____.
Please choose the correct answer from the following choices, and then select the submit answer button.
two atoms are
two atoms are repelled from each other
Fuel molecules undergo combustion in which cellular location?
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mitochondria
chloroplasts
endosomes
cytoplasm
mitochondria
Noncovalent interactions vary in the energy associated with the bond. Which sequence puts the energy levels in the CORRECT order?
electrostatic interactions < hydrogen bonds
electrostatic interactions = hydrogen bonds
hydrogen bonds < van der Waals intera
van der Waals interactions < electrostatic interactions