推 liltwnboiz :35................你怎麼打的.................... 07/08 12:24
推 ALegmontnick:done 07/08 15:45
> -------------------------------------------------------------------------- <
作者: shokanshorin (上官薔凜) 看板: NTU-Exam
標題: [試題] 97上 陳俊宏 普通生物學乙上 第一次期中考 Part2
時間: Sun Jul 10 11:57:27 2011
課程名稱︰普通生物學乙上
課程性質︰必修
課程教師︰陳俊宏
開課學院：醫學院
開課系所︰醫學系
考試日期（年月日）︰2008／10／27
考試時限（分鐘）：110min
是否需發放獎勵金：是
（如未明確表示，則不予發放）
21. Which of the following intermediary metabolites enters the citric acid
cycle and is formed, in part, by the removal of a carbon dioxide (CO2) from
one molecule of pyruvate?
A. alcohol. B. lactate. C. glyceraldehydes-3-phosphate.
D. acetyl-CoA. E. citrate.
22. During aerobic respiration, electrons travel downhill in which sequence?
A. food → NADH → electron transport chain → oxygen.
B. food → citric acid cycle → ATP → NAD+.
C. glucose → pyruvate → ATP → oxygen.
D. food →glycolysis → citric acid cycle → NADH → ATP.
E. glucose → ATP → electron transport chain → NADH.
23. What is proton-motive force?
A. The force required to remove an electron from hydrogen.
B. Movement of hydrogen into the mitochondrion.
C. The transmembrane proton concentration gradient.
D. The addition of hydrogen to NAD+.
E. The transmembrane proton concentration gradient. (the same as C)
24. Which of the following describes ubiquinone?
A. A small hydrophobic electron carrier.
B. A protein in the electron transport chain.
C. A substrate for synthesis of FADH2.
D. An essential amino acid.
E. A vitamin needed for efficient glycolysis.
25. In alcohol fermentation, NAD+ is regenerated from NADH during which of the
following?
A. reduction of pyruvate to form lactate.
B. oxidation of NAD+ in the citric acid cycle.
C. phosphorylation of ADP to form ATP.
D. reduction of pyruvate to PEP.
E. reduction of acetaldehyde to ethanol. (ethyl alcohol)
26. Phosphofructokinase is an important control enzyme in the regulation of
cellular respiration. Which of the following statements describes a
function of phosphofructokinase?
A. It is an allosteric enzyme. B. It is activated by ATP.
C. It is inhibited by AMP.
D. It catalyzes the conversion of fructose-1,6-bisphosphate to
fructose-6-phosphate, an early step of glycolysis.
E. It is inhibited by citrate, an intermediate of the citric acid cycle.
27. In vertebrate animals, brwon fat tissue's color is due to abundant contains
relatively few mitochondria. Brown fat cells have a specialized protein
that dissipates the proton-motive force across the mitochondrial membranes.
Which of the following might be the function fo the brown fat tissue?
A. to increase the production of ATP synthase.
B. to increase the rate of oxidative phosphorylation from its few
mitochondria.
C. to allow the animals to regulate their metabolic rate when it is
especially hot.
D. to regulate temperature by converting energy from NADH oxidation to
heat.
E. to allow other membranes of the cell to perform mitochondrial function.
28. Which of the following are directly associated with photosystem Ⅰ?
A. P680 reaction-center chlorophyll.
B. harvesting of light energy by ATP.
C. passing electrons to plastoquinone.
D. receiving electrons from plastocyanin.
E. extraction of hydrogen electrons from the splitting of water.
29. In mitochondria, chemiosmosis translocates protons from the matrix into the
intermembrane space, whereas in chloroplasts, chmiosmosis translocates
protons from
A. the stroma to the thylakoid space.
B. the matrix to the stroma.
C. the stroma to the photosystem Ⅱ.
D. the intermembrane space to the matrix.
E. ATP synthase to NADP+ reductase.
30. Why are C4 plants able to photosynthesize with no apparent
photorespiration?
A. They do not participate in the Calvin cycle.
B. They use PEP carboxylase to initially fix CO2.
C. They are adapted to cold, wet climates.
D. They conserve water more efficiently.
E. They exclude oxygen from their tissues.
31. CAM plants keep stomata closed in daytime, thus reducing loss of water.
They can do this because they
A. fix CO2 into pyruvate in the mesophyll cells.
B. fix CO2 into sugars in the bundle-sheath cells.
C. fix CO2 into organic acids during the night.
D. use the enzyme phosphofructokinase, which outcompetes rubisco for CO2.
E. use photosystems Ⅰ and Ⅱ at night.
32. Vinblastine is a standard chmotherapeutic drug used to treat cancer.
Because it interferes with the assembly of microtubules, its effectiveness
must be related to
A. disruption of mitotic spindle formation.
B. inhibition of regulaorty protein phosphorylation.
C. myosin denaturation and inhibition of cleavage furrow formation.
D. inhibition of DNA synthesis.
E. suppression of cyclin production.
33. Cells from an advanced malignant tumor most often have very abnormal
chromosomes, and often an abnormal total number of chromosomes. Why might
this occur?
A. Chromosomally abnormal cells still have normal metabolism.
B. Transformation introduces new chromosomes into cells.
C. Cancer cells are no longer density dependent.
D. Cancer cells are no longer anchorage dependent.
E. Chromosomally abnormal cells can still go through cell cycle
checkpoints.
34. Which of the following describe(s) cyclin-dependent kinase (Cdk) ?
A. Cdk is present throughout the cell cycle.
B. Cdk is inactive, or "turned off," in the presence of cyclin.
C. Cdk is an enzyme that attaches phosphate groups to other proteins.
D. Both A and C are true.
E. Both B and C are true.
35. The MPF protein complex turns itself off by
A. activating a process that destroys cyclin component.
B. activating an enzyme that stimulates cyclin.
C. binding to chromatin. D. exiting the cell.
E. activating the anaphase-promoting complex.
36. Which phase of the cell cycle is shortest?
A. G0. B. G1. C. S. D. G2. E. M.
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 114.40.173.192
推 ALegmontnick:done 07/10 14:25
> -------------------------------------------------------------------------- <
作者: shokanshorin (上官薔凜) 看板: NTU-Exam
標題: [試題] 97上 陳俊宏 普通生物學乙上 第一次期中考 Part3
時間: Sun Jul 10 14:14:42 2011
課程名稱︰普通生物學乙上
課程性質︰必修
課程教師︰陳俊宏
開課學院：醫學院
開課系所︰醫學系
考試日期（年月日）︰2008／10／27
考試時限（分鐘）：110min
是否需發放獎勵金：是
（如未明確表示，則不予發放）
Part B. Multiple choice (2 points * 20)
1. Replication in prokaryotes differs from replication in eukaryotes for which
of these reasons?
A. The prokaryotic chromosome has histones, whereas eukaryotic chromosomes
do not.
B. Prokaryotic chromosomes have a single origin of replication, whereas
eukaryotic chromosomes have many.
C. The rate of elongation during DNA replication is slower in prokaryotes
than in eukaryotes.
D. Prokaryotes produce Okazaki fragments during DNA replication, but
eukaryotes do not.
E. Prokaryotes have telomeres, and eukaryotes do not.
2. What is meant by the description "antiparallel" regarding the strands that
make up DNA?
A. The twisting narute of NDA creates nonparallel strands.
B. The 5' to 3' direction of one strand runs counter to the 5' to 3'
direction of the other strand.
C. Base pairings create unequal spacing between the two DNA strands.
D. One strand is positively charged and the other is negatively charged.
E. One strand contains only purines and the other contains only pyrimidines.
3. To repair a thymine dimer by nucleotide excision repair, in which order do
the necessary enzymes act?
A. exonuclease, DNA polymerase Ⅲ, RNA primase.
B. helicase, DNA polymerase Ⅰ, DNA ligase.
C. DNA ligase, nuclease, helicase.
D. DNA polymerase Ⅰ, DNA polymerase Ⅲ, DNA ligase.
E. endonuclease, DNA polymerase Ⅰ, DNA ligase.
4. Which would you expect of a eukaryotic cell lacking telomerase?
A. a high probability of becoming cancerous.
B. production of Okazaki fragments.
C. inability to repair thymine dimers.
D. a reduction in chromosome length.
E. high sensitivity to sunlight.
5. Which of the following statements is TRUE of chromatin?
A. Heterochromatin is composed of DNA, whereas euchromatin is made of DNA
and RNA.
B. Both heterochromatin and euchromatin are found in the cytoplasm.
C. Heterochromatin is highly condensed, whereas euchromatin is less compact.
D. Euchromatin is not transcribed, whereas heterochromatin is transcribed.
E. Only euchromatin is visible under the light microscope.
6. The genetic code is essentially the same for all organisms. From this, one
can logically assume all of the following EXCEPT
A. A gene from an organism could theoretically be expressed by any other
organism.
B. All organisms have a common ancestor.
C. DNA was the first genetic material.
D. The same codons in different organisms usually translate into the same
amino acids.
E. Different organisms have the same number of different types of amino
acids.
7. Which of the following is TRUE for both prokaryotic and eukaryotic gene
expression?
A. After transcription, a 3' poly-A tail and a 5' cap are added to mRNA.
B. Translation of mRNA can begin before transcription is complete.
C. RNA polymerase binds to the promoter region to begin transcription.
D. mRNA is synthesized in the 3' → 5' direction.
E. The mRNA transcript is the exact complement of the gene from which it was
copied.
8. Transcription in eukaryotes requires which of the following in addition to
RNA polymerase?
A. the protein product of the promoter.
B. start and stop codons.
C. ribosomes and tRNA.
D. several transcription factors. (TFs)
E. aminoacyl synthetase.
9. Chosse the answer that has these events of protein synthesis in the proper
sequence.
1. An aminoacyL-tRNA binds to the A site.
2. A peptide bond forms between the new amino acid and a polypeptide chain.
3. tRNA leaves the P site, and the P site remains vacant.
4. A small ribosomal subunit binds with mRNA.
5. tRNA translocates to the P site.
A. 1,3,2,4,5 B. 4,1,2,5,3 C. 5,4,3,2,1 D. 4,1,3,2,5 E. 2,4,5,1,3
10. Which of the following DNA mutations is the most likely to be damaging to
the protein it specifies?
A. a base-pair deletion. B. a codon substitution.
C. a substitution in the last base of a codon.
D. a codon deletion. E. a point mutation.
11. Of the following, which is the most current description of a gene?
A. a unit of heredity that causes formation of a phenotypic characteristic.
B. a DNA subunit that codes for a single complete protein.
C. a DNA sequence that is expressed to form a functional product: either
RNA or polypeptide.
D. a DNA-RNA sequence combination that results in an enzymatic product.
E. a discrete unit of hereditary information that consists of a sequence of
amino acids.
12. Altering patterns of gene expression in prokaryotes would most likely
serve the organism's survival in which of the following ways?
A. organzing gene expression so that genes are expressed in a given order.
B. allowing each gene to be expressed an equal number of times.
C. allowing the organism to adjust to changes in environmental conditions.
D. allowing young organisms to respond differently from more mature
organisms.
E. allowing environmental changes to alter the prokaryotes's genome.
13. Genomic imprinting, DNA methylation, and histone acetylation are all
examples of
A. genetic mutation. B. chromosomal rearrangements.
C. karyotypes. D. epigenetic phenomena.
E. translocation.
14. Approximately what proportion of the DNA in the human genome codes for
proteins or functional RNA?
A. 83% B. 46% C. 32% D. 13% E, 1.5%
15. In eukaryotes, general transcription factors
A. are required for the expression of specific protein-encoding genes.
B. bind to other proteins or to a sequence element within the promoter
called the TATA box.
C. inhibit RNA polymerase binding to the promoter and begin transcribing.
D. usually lead to a high level of transcription even without additional
SPECIFIC transcription factors.
E. bind to sequence just after the start site of transcription.
16. The incidence of cancer increases dramatically in older humans because
A. The Ras protein is more likely to be hyperactive after age sixty.
B. Proteasomes become more active with age.
C. As we age, normal cell division inhibitors cease to functino.
D. The longer we live, the more mutations we accumulate.
E. Tumor-suppressor genes are no longer able to repair damaged DNA.
17. Which of the following seems to be the known upper and lower size limits
of genomes?
A. 1 ~ 2900 Mb. (million base pairs)
B. 1,500 ~ 40,000 Mb. C. 1 ~ 580,000 Mb.
D. 100 ~ 120,000 Mb. E. 100 ~ 200,000 Mb.
18. Which of the following is a major distinction between a transposon and a
retrotransposon?
A. A transposon always leaves a copy of itself at its original position
and a retrotransposon does not.
B. A retrotransposon always uses the copy-paste mechanism, while a
transposon uses cut and paste mechanism.
C. A transposon is related to a virus and a retrotransposon is not.
D. A transposon moves via a DNA intermediate and a retrotransposon via an
RNA intermediate.
E. The positioning of a transposon copy is transient while that of a
retrotransposon is permanent.
19. Bioinformatics includes all of the following EXCEPT
A. using computer programs to align DNA sequences.
B. analyzing protein interactions in a species.
C. using molecular biology to provide biological information to a system
so that it gets expressed.
D. development of computer-based tools for genome analysis.
E. use of mathematical tools to make sense of bioological systems.
20. Two eukaryotic proteins have one domain in common but are otherwise very
different. Which of the following processes is most likely to have
contributed to this phenomenon?
A. gene duplication. B. RNA splicing.
C. exon shuffling. D. histone modification.
E. random point mutations.
Ⅲ. Give a proper word or statement in the blank. (one point for each)
1. The reaction center of Photosystem Ⅰ and system Ⅱ in chloroplasts are
____________________ and ____________________, respectively. The molecular
oxygen is generated by ____________________. (which photosystem)
2. Higher plants posses several types of photosynthesis-related pigments.
____________________ is essential for photochemical reactions, and others
are accessory pigments: ____________________ and ____________________.
3. The Calvin cycles has three phases:
(i) CO2 fixation, catalyzed by ____________________, the most abundant
leaf protein;
(ii) ____________________ __________ __________ ____________________.
(a method)
(iii) ____________________________________________________________________.
(the next method)
4. CO is a respiratory inhibitor that blocks ____________________ (which step)
respiration.
5. The major functions of cellular respiration are: ____________________ and
____________________.
6. ____________________ (a protein complex) located in inner mitochondrial
membrane couples the electron transport process and ATP production.
7. The products of linear electron transport of photosynthesis are
____________________ and ____________________.
8. How many reduced dinucleotides can be produced while the Calvin cycle runs
two turns: __________ FADH2, __________ NADH and __________ NADPH.
(Fill in numbers)
9. The sodium-potassium pump is called an electrogenic pump because it pumps
__________ Na+ out and __________ K+ at the expense of one ATP.
(Fill in numbers)
10. All the DNA in a cell constitutes the cell's ____________________.
11. When a cell is dividing, two chromatids are separated after metaphase
because ____________________ is split and chromosomes move toward the
poles of the spindle because the microtubular fiber attached is shortened
to by depolymerization at the ____________________ ends.
12. Plasmodesmata in plant tissues are most similar in function to
____________________ of animal cells.
(a structure of cellular connections)
--
剛剛有個GPA快4的死小孩丟水球給我
結果家裡的網路太不爽他了
就給我瞬斷瞬連...
這篇如果沒1000p的話含發放獎勵金都要他賠~~(口桀口桀)
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 114.40.173.192
→ shokanshorin:451P...TC你完蛋了 07/10 14:14
※ 編輯: shokanshorin 來自: 114.40.173.192 (07/10 14:15)
→ ALegmontnick:done 07/10 14:25