1.非选择题- (共2题)

(1)该化合物中,—NH2表示________,—COOH表示________,形成该化合物的生物化学反应叫做______________,假如组成这个化合物的单体的平均相对分子质量为120,则这个化合物的相对分子质量为________。
(2)图中表示连接两个氨基酸的肽键的结构是_________,图中化合物由_________种氨基酸形成。
(3)这个化合物水解消耗的水分子数目是_________,写出水解后能得到分子的结构式_______________(写出其中之一)。
(4)通过实验得知该化合物能与双缩脲试剂发生反应,溶液颜色呈_________,在使用双缩脲试剂时应注意______________。

(1)唾液淀粉酶是唾液腺细胞产生的具有催化能力的蛋白质,其基本组成单位是_______。[ ]__________是合成这种蛋白质的机器,对其进行进一步修饰加工、分类包装的结构是[ ]__________。
(2)与高等植物细胞相比,此图中特有的细胞器是[ ]_______;
(3)图中的6是________的主要场所。________染液可将活细胞中的这种细胞器染成蓝绿色。
(4)控制唾液淀粉酶合成的遗传物质存在于[ ]_____________中,其中的染色质是容易被_____________染料染成深色的物质。
2.单选题- (共16题)
A.HIV病毒由蛋白质和核酸组成
B.乙肝病毒依赖人体肝细胞生活
C.草履虫会逃避有害刺激
D.父母亲通过精子和卵细胞把遗传物质传给下一代
A.生命活动都是由蛋白质调节 |
B.干种子因缺乏自由水不能萌发 |
C.多糖都是植物细胞的直接能源物质 |
D.一切生物的遗传物质都是DNA |
A. 主要由C、H、O三种元素组成 B. 分子中H原子所占比例较高
C. 分子中O的数量比H多 D. 脂肪有减少热量散失的作用
A.氨基酸、核苷酸、葡萄糖 | B.核苷酸、碱基、磷酸 |
C.脱氧核糖、碱基、磷酸 | D.核糖、碱基、磷酸 |

A.若①为某种大分子的组成单位,则①最可能是氨基酸 |
B.若③为能储存遗传信息的大分子物质,则③一定是DNA |
C.若②是细胞中良好的贮能物质,则②是脂肪 |
D.若④主要是在动物肝脏和肌肉中合成的贮能物质,则④是糖原 |
A.A+B,40 | B.A,20 | C.>A,>20 | D.<A,20 |

A.A中肯定含有S元素 |
B.①过程发生伴随着水的生成 |
C.多肽中B的数目等于C的数目 |
D.蛋白质结构和功能的多样性是细胞多样性的根本原因 |

A.该蛋白质至少含有n-2个氧原子 |
B.合成该蛋白质时生成n-2个水分子 |
C.该蛋白质至少含有n+2个羧基 |
D.该蛋白质水解产物增加2n-4个氢原子 |

A.甲基绿能将乙聚合成的大分子染成绿色 |
B.所有生物体中都有5种碱基和8种核苷酸 |
C.DNA彻底水解得到的产物中有脱氧核糖又有核糖 |
D.脱氧核糖核酸中的遗传信息储存在甲的排列顺序中 |
A. 蛙的成熟红细胞中不含DNA分子
B. 人体细胞的细胞质中也有DNA分子
C. 含DNA的原核细胞不会同时含RNA
D. 细菌细胞的拟核中无DNA
A.核糖、葡萄糖、脱氧核糖是动植物细胞共有的单糖 |
B.葡萄糖、乳糖可以被小肠上皮细胞直接吸收,而淀粉不可以 |
C.葡萄糖和果糖均是还原糖,所以二者缩合成的二糖也是还原糖 |
D.脂肪比相同质量的糖类氧化分解释放的能最多,所以脂肪是主要的能源物质 |
3.选择题- (共1题)
Although I didn't have any interest in being a school bus driver, I became one. Many years later, I was still working on the school bus. There are so many good reasons. Firstly, the talk brought me different kinds of information. I also got to hear all the family secrets of the newcomers. I have a toy bear who was a great comforter(安慰者) for the little ones. The kids got to look after him on the trip to school and he waited patiently for them to get on for the trip home.
Our bus would often pass a place where we could see some alpacas (羊驼) in front of a farm house. Little Michael would cry excitedly from the seat, “Look, Miss! Look at the camels!” He used to put his head out of the bus window. When I warned him that a little insect would come into his nose if he wasn’t careful, he smartly gave up the habit.
I remember a little girl got on the bus one morning 5 years ago and sobbed(抽泣) all the way to school. We arrived at the school gate. As she waited to get down the bus, she threw her arms around my neck and cried that her grandfather had died the night before.
A school bus driver needs to keep one eye on the road and the other on the mirror to watch what the little ones are doing down the back.
Now, it's important to think how many lives I've been responsible(负责的) for, and how many kilometers I've driven in order to get my passengers home safely during the 20 years. I've enjoyed it, but it’s time to rest and park my school bus.
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【1】题量占比
非选择题:(2道)
单选题:(16道)
选择题:(1道)
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【2】:难度分析
1星难题:0
2星难题:0
3星难题:0
4星难题:0
5星难题:0
6星难题:15
7星难题:0
8星难题:3
9星难题:0