What is binary fission quizlet
Choose the one alternative that best completes the statement or answers the question. B one gene-one enzyme; Beadle and Tatum. A A nanometer is one millionth of a millimeter. B A nanometer is one millionth of a meter. C A nanometer is about the size of a common bacterial cell. D The nanometer is the most common measurement used in measuring whole cells.
B the distance that an object must be moved to be distinguished from its background. C the distance that two objects must be apart in order to be distinguished as separate objects. D the solvent that must be available to remix a solution. A EM can be used to examine the movement of flagella.
B The limit of resolution for EM is about 0. C EM came to be used extensively in the early s. E Electrons replace light in the electron microscope. Which of the following terms conveys the least degree of certainty? A These macromolecules are only incorporated into structures outside the membrane.
B Macromolecules are broken down extracellularly, and their subunits diffuse through the membrane. C Macromolecules are digested extracellularly, and their subunits move through transport proteins.
D Macromolecules are transported via endocytosis and digested within the cell. When added to a mixture of oil and water, the pigment creates a blue ring around droplets of oil. Which of the following statements best describes this new pigment?
A The pigment is a polar molecule and is forming hydrogen bonds with both oil and water molecules. B The pigment is hydophilic and will not form hydrophobic bonds with the oil. C The pigment molecule is neither polar or nonpolar, but is apolar.
D The pigment molecule is amphipathic, having polar and nonpolar regions. E The pigment is probably hydrophobic and is attempting to bond with the oil. A Phospholipids have hydrocarbon tails. C Many hydrocarbons are used in living systems. E Only hydrogen atoms are used to complete the valence requirements of carbon. Which of the following is NOT a functional group? A Carbon-containing molecules are stable.
B Carbon-containing molecules form stereoisomers. C Carbon-containing molecules are diverse. E Carbon atoms are most likely to form ionic bonds with one another. A organic molecules, macromolecules, organelles, supramolecular structures, cells. B organelles, organic molecules, supramolecular structures, macromolecules, cells.
C organic molecules, macromolecules, supramolecular structures, organelles, cells. D macromolecules, organic molecules, supramolecular structures, organelles, cells. E organic molecules, supramolecular structures, macromolecules, organelles, cells. A The sodium ions repel the partial negative end of the water dipole. B NaCl is a very dry powder, and the water is able to soak into the salt.
C The partially charged ends of the water molecules are able to surround the oppositely charged salt ion. D Spheres of hydration form between the water and the ions. A permeable to some molecules and impermeable to others. E permeable to most small molecules, but impermeable to larger ones. B Water molecules create spheres of hydration around solute molecules. D Water molecules are often associated via hydrogen bonds. A The polymer chain usually has two ends.
B Macromolecules are synthesized by the stepwise addition of a monomer. C The monomer is usually activated by the coupling of the monomer to a carrier. D Often the energy needed for polymerization is supplied by ATP. E Water is used to join the monomers of the macromolecules.
A It is responsible for correct positioning of amino acids in a polypeptide. B It serves as the site of protein synthesis. C It functions in transcription, translation and replication. D It is an important component of ribosomes. B Purines bind readily to deoxyribose, but not ribose. C Purines have a double-ringed structure. D Adenine's bonding to thymine is stronger than is guanine's to cytosine. E Both adenine and thymine are purines. A both use the energy of ATP hydrolysis to drive movement.
B microtubules slide relative to actin filaments in both cases. C both require actin and myosin for correct function. D the enzymes that catalyze motion are the same in both cases. A Only around 20 amino acids are used in protein synthesis. B All amino acids exist in two stereoisomeric forms. C Amino acids have an N-terminus, C-terminus, and R groups. D There are more than 60 different kinds of amino acids present in the cell. E The R group of amino acids differs from one amino acid to another.
A internal contents of organelles. B area of the cell not occupied by the nucleus. C semifluid substance in which organelles are suspended. D three dimensional array of interconnected filaments. Write the word or phrase that best completes each statement or answers the question. A Cadang-cadang is a viroid disease of the coconut palm. D Viroids possess about nucleotides. A Plant cells are often much larger than animal cells. B Plant cells may contain chloroplasts. C Only plant cells have a cell membrane.
D Chromosomes are found only in plant cells. B bacteria growing on decomposing matter. B it is required to make specific alterations in the cell. C all life forms require a continuous supply of it. A D H is change in enthalpy. C D H is change in heat content. D A reaction with a positive D H value is exothermic. Choose the item in column 2 that best matches each item in column 1. Match the type of work with the example of that type of work. Which of the following types of work is performed by the firefly?
A accepting or donating protons by the enzyme. C a change in enzyme conformation induced by substrate binding. Match the symbol on the left with its description on the right. Match the following reactions with the enzyme that would catalyze the reaction.
Which of the following statements best explains why this occurs? A Enzymes do not function as well at temperatures other than the optimal temperature.
B Sweating removes prosthetic groups from biological systems. C Bacteria and viruses reproduce more rapidly at higher body temperature. D The higher temperature increases the activity of lysases. C crystallize a common animal protein.
D originate the term ferments to describe enzymes.