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2012考研專(zhuān)業(yè)課自測(cè)試題及答案之細(xì)胞生物學(xué)
來(lái)源:求學(xué)問(wèn)校網(wǎng) 發(fā)表時(shí)間:2011-12-01 瀏覽 14 次
一、填空題
1. 細(xì)胞中水對(duì)于維持細(xì)胞溫度的相對(duì)穩(wěn)定具有重要作用,其原因是 。
2. 纖粘連蛋白與細(xì)胞結(jié)合的結(jié)構(gòu)域具有特征性的三肽結(jié)構(gòu),簡(jiǎn)稱(chēng)RGD 序列,代表的三個(gè)氨基酸是∶ 。
3. _ _ is an intracellular protein that binds calcium and activates enzymes.
4.A substance that fits into a specific binding site on the surface of a protein molecule is called a __ .
5. Two products of phospholipase C activity that serve as second messengers are _ and .
二、判斷題
1. Ⅱ型內(nèi)含子的剪接與核剪接機(jī)理相似, 都要形成剪接體和套索結(jié)構(gòu)。
2. 5SrRNA是由RNA聚合酶Ⅱ轉(zhuǎn)錄的, 它使用的是內(nèi)部啟動(dòng)子。
3. The surface area/volume ratio is generally greater for a prokaryotic cell
than for a eukaryotic cell.
4. The ribosomes found in the mitochondria of your musde cells are more like
those of the bacteria in your intestine than they are like the ribosomes
in the cytosol of your musde cells.
5. Facilitated diffusion of a cation occurs only from a compartment of higher concentration to a compartment of lower concentration.
三、選擇題
1. The distribution of K across an artificial membrane was measured, and the concentrations were found to be equal on both sides. Which of the following statements is true about the distribution of K ?
a.K must be at equilibrium across the cell membrane
b.K cannot be at equilibrium across the membrane
c.There cannot be a membrane potential under these conditions
More information is needed to determine whether K is at
equilibrium
2.Which mutant form of ras is likely to cause malignancy?
a.ras that cannot hydrolyze GTP b.ras that cannot bind to GTP
c.ras that cannot bind to Grb2 or Sos d.ras that cannot bind to Raf
3. The hormone glucagon stimulates the breakdown of stored glycogen in liver and muscle cells by the following enzymes. Which is the first enzyme that must be activated?
a. Protein kinase A b. Phosphorylase kinase
c. Glycogen phosphorylase d. Protein phosphatase
e. Protein phosphatase inhibitor-1
4. A cancer-causing gene makes G protein permanently bind to GTP, this results in( ).
a. Continual production of cAMP. b. Continual production of GDP.
c. Inhibition of cGMP production. d. Inhibition of adenylyl cyclase.
e. None of the above
5. Which one of the following is not part of a prokaryotic ribosome?
a. A 30S subunit consisting of 16S rRNA
b. A 50S subunit consisting of 23S and 5S rRNA
c. A 30S subunit consisting of 21 proteins
d. A 40S subunit consisting of 18S rRNA
e. None of the above
四、簡(jiǎn)答題
1. 1981年,Thomas Cech和他的同事在世界上首次發(fā)現(xiàn)核酶,并獲得了支持這一發(fā)現(xiàn)的實(shí)驗(yàn)證據(jù)。從他們的發(fā)現(xiàn)中你有何感想?
2. 為什么說(shuō)水是細(xì)胞中優(yōu)良的熱緩沖體系?
五、問(wèn)答題
1. 生物膜是怎樣合成的?可能的機(jī)理是什么?
2. 微管組裝的基本過(guò)程怎樣?
1. 細(xì)胞中水對(duì)于維持細(xì)胞溫度的相對(duì)穩(wěn)定具有重要作用,其原因是 。
2. 纖粘連蛋白與細(xì)胞結(jié)合的結(jié)構(gòu)域具有特征性的三肽結(jié)構(gòu),簡(jiǎn)稱(chēng)RGD 序列,代表的三個(gè)氨基酸是∶ 。
3. _ _ is an intracellular protein that binds calcium and activates enzymes.
4.A substance that fits into a specific binding site on the surface of a protein molecule is called a __ .
5. Two products of phospholipase C activity that serve as second messengers are _ and .
二、判斷題
1. Ⅱ型內(nèi)含子的剪接與核剪接機(jī)理相似, 都要形成剪接體和套索結(jié)構(gòu)。
2. 5SrRNA是由RNA聚合酶Ⅱ轉(zhuǎn)錄的, 它使用的是內(nèi)部啟動(dòng)子。
3. The surface area/volume ratio is generally greater for a prokaryotic cell
than for a eukaryotic cell.
4. The ribosomes found in the mitochondria of your musde cells are more like
those of the bacteria in your intestine than they are like the ribosomes
in the cytosol of your musde cells.
5. Facilitated diffusion of a cation occurs only from a compartment of higher concentration to a compartment of lower concentration.
三、選擇題
1. The distribution of K across an artificial membrane was measured, and the concentrations were found to be equal on both sides. Which of the following statements is true about the distribution of K ?
a.K must be at equilibrium across the cell membrane
b.K cannot be at equilibrium across the membrane
c.There cannot be a membrane potential under these conditions
More information is needed to determine whether K is at
equilibrium
2.Which mutant form of ras is likely to cause malignancy?
a.ras that cannot hydrolyze GTP b.ras that cannot bind to GTP
c.ras that cannot bind to Grb2 or Sos d.ras that cannot bind to Raf
3. The hormone glucagon stimulates the breakdown of stored glycogen in liver and muscle cells by the following enzymes. Which is the first enzyme that must be activated?
a. Protein kinase A b. Phosphorylase kinase
c. Glycogen phosphorylase d. Protein phosphatase
e. Protein phosphatase inhibitor-1
4. A cancer-causing gene makes G protein permanently bind to GTP, this results in( ).
a. Continual production of cAMP. b. Continual production of GDP.
c. Inhibition of cGMP production. d. Inhibition of adenylyl cyclase.
e. None of the above
5. Which one of the following is not part of a prokaryotic ribosome?
a. A 30S subunit consisting of 16S rRNA
b. A 50S subunit consisting of 23S and 5S rRNA
c. A 30S subunit consisting of 21 proteins
d. A 40S subunit consisting of 18S rRNA
e. None of the above
四、簡(jiǎn)答題
1. 1981年,Thomas Cech和他的同事在世界上首次發(fā)現(xiàn)核酶,并獲得了支持這一發(fā)現(xiàn)的實(shí)驗(yàn)證據(jù)。從他們的發(fā)現(xiàn)中你有何感想?
2. 為什么說(shuō)水是細(xì)胞中優(yōu)良的熱緩沖體系?
五、問(wèn)答題
1. 生物膜是怎樣合成的?可能的機(jī)理是什么?
2. 微管組裝的基本過(guò)程怎樣?
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