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Cell Biology Final Exam (T or F & MC)
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Cell Biology Final Exam (T or F & MC)
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Cell Biology Final Exam (T or F & MC)True - ANS-The highest resolution microscopy is obtained using an electron microscope
True - ANS-Eukaryotic cells are in general bigger than prokaryotic cells
False - ANS-All amino acids are hydrophilic
True - ANS-In cells the actual ∆G for a reaction is often quite different from ∆Go
True - ANS-Transmembrane proteins have a-helix regions that span the lipid bilayer
True - ANS-New cells only arise from the growth and division of previously existing cells
True - ANS-Plant cells have a cell wall that animal cells lack
True - ANS-Methylation is one modification of histone proteins that can change gene expression
False - ANS-Histone proteins have a large number of negatively charged amino acids in their
sequence
True - ANS-The nucleolus is where many of the genes for rRNA are located
False - ANS-Decreasing the percentage of unsaturated fatty acids in a biological membrane will
increase its fluidity
False - ANS-Mutations in the DNA of an organism are kept to a small rate of occurrence by the
5' to 3' exonuclease activity of DNA polymerase
True - ANS-Both the concentration gradient and the membrane potential affect the passive
transport of charged solutes
False - ANS-Membrane phospholipids often flip-flop across the membrane
False - ANS-Glycolysis cannot occur in the absence of oxygen
False - ANS-The set of metabolic reactions in cells that help synthesize all the cellular
components are called catabolism
False - ANS-In prokaryotes the electron transport chain involves the mitochondrial membrane
False - ANS-The pyruvate dehydrogenase reaction results in the reduction of FAD+ to FADH2
, True - ANS-During glycolysis there is a net production of 2 ATPs
False - ANS-All proteins embedded int he cell membrane are free to diffuse within the plane of
the plasma membrane
True - ANS-The Calvin Cycle in plant cells occurs in the stroma of the chloroplasts
False - ANS-Proteins are transported into the MITOCHONDRIA in their completely folded
conformation
False - ANS-The trans face of the Golgi apparatus is closest to the nucleus
True - ANS-Endocrine signaling molecules travel in the blood stream to their target organs
False - ANS-When activated by binding of a signal molecule to a GPCR, the associated
G-protein exchanges the bound GTP for GDP
False - ANS-Phosphorylation of glycogen phosphorylate inactivates it
False - ANS-The Calvin cycle creates ATP and NADPH for use by the cell
True - ANS-Steroid hormones bind to receptors in the cytosol or nucleus of target cells
False - ANS-The βy subunits of trimeric G proteins can activate adenylyl cyclase
True - ANS-The pH in the lysosome is typically around 5
True - ANS-During photosynthetic electron transport the pH in the thylakoid lumen decreases
True - ANS-The enzyme responsible for all the biomass on Earth is ribulose bis-phosphate
carboxylase (rubisco)
True - ANS-Most enzyme-linked receptors have turned out to be tryosine kinases
False - ANS-Green plants have only chlorophyll as the photosynthetic pigment in their leaves
False - ANS-Actin filaments are made of various kinds of proteins
Golgi Apparatus - ANS-The organelle where carbohydrates and lipids are added to proteins
before they are secreted is the
nucleus - ANS-By definition, prokaryotic cells do not possess
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