問題一覧
1
what is the most likely pathway taken by synthesized protein that will be secreted by a cell
ER→golgi→vesicle that fuse with plasma membrane
2
the citric acid cycle
（C）produces both NADH and FADH2
3
phospholipids and triglycerides both
（C）have a glycerol backbone
4
in a chemical reaction
（B）transition state have higher free energy than either the reactants or the products
5
steroids are considered to be lipids because they
are not soluble in water
6
lipid-soluble signaling molecules, such as testosterone, cross the membranes of all cells but affect only target cells because
（B）intracellular receptors are present only in target cells
7
the mitotic spindle plays a critical role in which of the following processes
separation of sister chromatids
8
what is the name of the microtubule-organizing center found in animal cells as an identifiable structure present during all phases of the cell cycle
centrosome
9
all of the following are part of a prokaryote cell except
an endomembrane reticulum
10
which statement about energy is true
（B）kinetic energy is related to motion
11
which of the following statements describes the chromosomal makeup of each daughter cell after telophase of meiosis I
the cells are haploid, and the chromosomes are each composed of two chromatids
12
the final products of glycolysis are (1)ATP (2)CO2 (3)pyruvate (4)NAD+ (5)NADH
135
13
the molecule formula for glucose is C6H12O6. what would be the molecular formula for a molecule made by linking three glucose molecules together by dehydration reactions
C18H32O16
14
a chemical reaction with a positive g is
（A）endergonic
15
which of the following membrane activities requires energy from ATP
movement of Na+ ions from a lower concentration in a mammalian cell to a higher concentration in the extracellular fluid
16
what is the character of cyclin-dependent kinase (cdk)
（D）cdk attaches phosphates to proteins
17
scaffolding proteins are
large proteins to which several array proteins attach to facilitate cascade effect
18
a noncompetitive inhibitor inhibit the binding of substrate to an enzyme by
（D）change the shape of the active site
19
which of the following process include all others
passive transportation
20
which of the following is the best explanation for the inability of a specific animal cell to reduce the Ca2+ concentration in its cytosol compared with eyton cellular fluid
insufficient ATP levels in cytosol
21
singer and nicholson fluid mosaic model of membrane proposed that membrane
consist of proteins embedded in fluid phospholipid bilayer
22
a cleavage furrow is associated with which of the following cellular events
a groove in the plasma membrane between daughter nuclei
23
G1 is associated with which of the following cellular events
normal growth and cell function
24
what is the major structure difference between starch and glycogen
（D）the amount of branching that occurs in the molecules
25
plasmodesmata in plant cells are most similar in function to which of the following structures in animal cells
gap junctions
26
which of the following is a correct association
GTPase activity and hydrolysis of GTP to GDP
27
the toxin of vibrio cholerae causes profuse diarrhea because it
modifies a G protein involved in regulating salt and water secretion
28
cells require which of the following to form cilia or flagella
tubulin
29
which of the following is an example of cooperativity
（C）a molecular binding at one unit of a tetramer, allowing faster binding at each of the other three
30
metaphase is characterized by
alignment of chromosomes on the equator of cells
31
which of the following would be inhibited by a drug that specifically blocks the addition of phosphate group to proteins
receptor tynosine activity
32
substrate-level phosphorylation
use ATP synthase to produce ATP
33
the membrane of winter wheat are able to remain fluid when it is extremely cold is by
increasing the percentage of unsaturated phospholipids in the membrane
34
the liver is involved in detoxification of many poisons and drugs. which of the following structure is primarily involved in this process and, therefore, abundant in living ER
smooth ER
35
what is the term used for a protein molecule that assists in the proper folding of other poteins
chaperonin
36
which of the following statements defines a genome
the complete set of an organism's genes and other DNA sequences