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NU Bio 201 Ch. 3 Exam Questions And Accurate Answers
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NU Bio 201 Ch. 3 Exam Questions And Accurate AnswersA - SMOOTH ER: Site of synthesis of lipid and steroid molecules
B- MITOCHONDRIA: Produces ATP aerobically
C - LYSOSOMES: Site of enzymatic breakdown of phagocytized material AND Source of
cell autolysis.
D- MICROTUBULES: Forms the mitotic spindle AND Replicate for cell division
E - GOLGI APPARATUS: Packages proteins for insertion in the cell membrane or for
exocytosis - ANS
Plasma membrane - ANSWER A selectively-permeable phospholipid bilayer forming the
boundary of the cells
cystoplasm - ANSWER cellular material between the plasma membrane and the nucleus
consists of the cytosol and organelles
nucleus - ANSWER Control center of the cell, houses DNA
Endoplasmic Reticulum - ANSWER a network of tubular membranes within the
cytoplasm of the cell, occurring either with a smooth surface (smooth endoplasmic
reticulum) or studded with ribosomes (rough endoplasmic reticulum) involved in the
transport of materials.
A - Glycocalyx AND Identification "tags" for the cell
B - Polar regionof phospholipid AND Hydrophilic portion of phospholipid
C - Nonpolar region of phospholipid
D - Integral protein.
E - Peripheral protein - ANSWER
Transfer RNA - ANSWER Serve as "interpreter" molecules that recognize specific amino
acids and nucleotide base sequences
, Synthetase enzymes - ANSWER Attaches the correct amino acid to its transfer RNA
Ribosimal RNA - ANSWER Forms part of the protein synthesis site in the cytoplasm
AND
May be attached to the ER or scattered in the cytoplasm
ATP - ANSWER Provides the energy needed for synthesis reactions
mRNA ANSWER This molecule, synthesized in the nucleus carries information that
dictates the precise order of amino acids of the protein to be built
Early prophase ANSWER Centrioles migrate to opposite poles of the cell.
Late prophase ANSWER Nuclear membrane and nucleolus dissolve
Anaphase ANSWER Chromosomal centromeres divide, and sister chromatids separate
and begin to move to opposite ends of the cell
Metaphase ANSWER Chromosomes line up on equatorial plane of spindle in the center
Telophase - ANS Chromosomes uncoil to form chromatin
Nucleus - ANS Houses DNA and RNA
Microtubules - ANS Hollow cytoskeletal elements that serve as organizers for the
cytoskeleton
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