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DAT Biology Actual Exam Solved with Complete Verified Answers
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DAT Biology Actual Exam Solvedwith Complete Verified Answers
What is the function of ribosomes? - ✔✔The function of ribosomes is the synthesis of
proteins (assembly).
. What is the general function of the endoplasmic reticulum? - ✔✔The endoplasmic reticulum is
involved in the transport of materials throughout the cell.
(T/F) Proteins synthesized by RER are secreted directly into the cytoplasm. - ✔✔False, they
are secreted into the RER and then sent to the smooth ER where they are packaged into vesicles.
What is the function of the Golgi apparatus? - ✔✔The Golgi receives proteins from the SER,
modifies them, and repackages them into vesicles.
What happens to a secretory vesicle after it is released from the Golgi apparatus? - ✔✔A
secretory vesicle from the Golgi fuses with the cell membrane to release its contents via exocytosis.
(T/F) Vesicles are membrane-bound sacs involved in transport and storage of cellular materials. -
✔✔True
What is a lysosome? - ✔✔A lysosome is an organelle which digests material in the cell
. (T/F) Lysosomes fuse with endocytotic vesicles and help digest their contents - ✔✔True
,How does the pH in the interior of a lysosome compare with the pH in the rest of the cell? -
✔✔The pH inside the lysosome is lower(more acidic).
What would happen if a lysosome released its contents into cytoplasm? - ✔✔If a lysosome
released its contents into the cytoplasm, it would digest the contents of the cell.
What is the function of mitochondria? - ✔✔The mitochondria is the powerhouse of the cell, it is
the site of aerobic respiration.
(T/F) Mitochondria and chloroplasts are similar structures? - ✔✔True
What is the function of the cell wall? - ✔✔The cell wall gives the cell support and shape. It
also protects the cell from external stimuli and desiccation.
What is the function of centrioles? - ✔✔Centrioles pull chromosomes to opposite ends of the
cell during anaphase in mitosis. They are involved in animal cell spindle formation.
What is a centrosome? - ✔✔The centrosome is the region of the cell that contains the centrioles
What is the function of the cytoskeleton? - ✔✔The cytoskeleton gives the cell support and shape,
and adds motility.
. (T/F) Simple diffusion is a passive process that requires energy. - ✔✔False, simple diffusion is
a passive process and therefore DOES NOT require energy.
Define Osmosis: - ✔✔Osmosis is the diffusion of water from an area of low solute concentration
to high solute concentration.
What would happen if the cell was put in hypertonic solution? - ✔✔It would cause the cell to shrink
, Define Isotonic - ✔✔Isotonic means that the concentration inside and outside the cell is
at equilibrium
Define facilitated diffusion - ✔✔Facilitated diffusion is the net movement of dissolved particles
down their concentration gradient with the help of carrier molecules.
What is endocytosis? - ✔✔Endocytosis is the movement of materials into the cell via indentations
in the cell membrane.
What is exocytosis? - ✔✔Exocytosis is the movement of materials outside the cell by vesicles
fusing the cell membrane to release contents
What are the components of a virus? - ✔✔A protein coat and nucleic acid
What kinds of nucleic acid are found in viruses? - ✔✔DNA or RNA
(T/F) Viruses are obligate intracellular parasites. - ✔✔True
What is a bacteriophage? - ✔✔A bacteriophage is a virus that has a bacteria host. It infects
bacteria only.
How do enzymes speed up a reaction? - ✔✔Enzymes lower the activation energy,
(T/F) Enzymes get used up during the course of a reaction - ✔✔False, enzymes do not get used up
(T/F) Enzymes are very selective in the reactions they catalyze. - ✔✔True
What is a substrate? - ✔✔A substrate is what the enzyme acts upon.
What is the active site? - ✔✔The active site is the area that the substrate attaches to on the enzyme.
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