题干

Ⅰ.科学家往小球藻培养液中通入14CO2后,分别给予小球藻不同时间的光照,结果如下表:

实验组别

光照时间(s)

放射性物质分布

1

2

大量3﹣磷酸甘油酸(三碳化合物)

2

20

12种磷酸化糖类

3

60

除上述12种磷酸化糖类外,还有氨基酸、有机酸等

根据上述实验结果分析,回答下列问题:

(1)本实验利用小球藻研究的是光合作用的____  阶段.

(2)每组照光后需将小球藻进行____  处理,才能测定放射物质分布.

(3)CO2进入叶绿体后,最初形成的物质是____  .

(4)实验结果说明光合作用产生的有机物包括____ .

Ⅱ.为了探究不同条件对植物光合速率和呼吸速率的影响,用8株都具有20片叶片、且大小长势相似的某种盆栽植株,分别放在密闭的玻璃容器中,在不同条件下利用传感器定时测定密闭容器中二氧化碳的含量,实验结果统计如下表:

编号

1

2

3

4

5

6

7

8

温度(℃)

10

10

20

20

30

30

40

40

光照强度(lx)

1000

0

1000

0

1000

0

1000

0

开始时CO2量(g)

5.0

5.0

5.

5.0

5.0

5.0

5.0

5.0

12hCO2量(g)

4.5

5.1

3.5

5.4

1.9

5.9

2.0

5.8

(1)编号为1、3、5、7的装置可构成一个相对独立的实验组合,在该实验组合中,自变量是____  ,无关变量是____  (至少答2个)

(2)编号为2、4、6、8的装置可构成一个相对独立的实验组合,该实验组合的目的是探究____ 

(3)在编号为2的装置中,叶肉细胞产生ATP的场所是 ____ .

(4)科研人员在该植株幼苗中发现了一株叶黄素缺失突变体,将其叶片进行红光照射光吸收测定和色素层析条带分析,与正常叶片相比,实验结果是:光吸收差异____ (填“显著”或“不显著”),色素带缺少第____  条(从上至下).

上一题 下一题 0.0难度 选择题 更新时间:2018-12-21 03:49:59

答案(点此获取答案解析)

\u6697\u53cd\u5e94,\u4f7f\u9176\u7684\u5931\u6d3b,3\ufe63\u78f7\u9178\u7518\u6cb9\u9178\uff08\u4e09\u78b3\u5316\u5408\u7269\uff09,12\u79cd\u78f7\u9178\u5316\u7cd6\u7c7b\u3001\u6c28\u57fa\u9178\u3001\u6709\u673a\u9178\u7b49,\u6e29\u5ea6,\u5149\

同类题2

阅读下列短文:从每题所给的 A、B、C、D 四个选项中,选出最佳选项,将正确的选项涂在答题卡上。


A

          One early morning, I went into the living room to find my mother reading a thick book called Best Loved Poems to Read Again and Again. My interest was aroused only by the fact that the word “Poems”appeared in big, hot pink letters.

      “Is it good?” I asked her.

      “Yeah,” she answered. “There's one I really like and you'll like it, too.’ I leaned forward.

    “‘Patty Poem,’” she read the title. Who is Patty? I wondered. The poem began:

She never puts her toys away,

                Just leaves them scattered(散乱的)where they lay,…      

The poem was just three short sections. The final one came quickly:

          When she grows and gathers poise(稳重),        

           I'll miss her harum-scarum(莽撞的) noise,        

           And look in vain(徒劳地) for scattered toys.       

And I’ll be sad.                 

    A terrible sorrow was hed over me. Whoever Patty was, she was a mean girl. Then,the shock.

    “It’syou, honey,” My mother said sadly.

    To my mother, the poem revealed a parent's affection when her child grows up and leaves. To me, the “she” in the poem was horror. It was my mama who would be sad. It was so terrible I burst out crying.

    “What's wrong?” my mother asked.

    “Oh Mama,” I cried. “I don't want to grow up ever!”

      She smiled. “Honey, it's okay. You're not growing up anytime soon. And when you do, I'll still love you, okay?”

    “ Okay,”I was still weeping. My panic has gone. But I could not help thinking about that silly poem. After what seemed like a safe amount of time, I read the poem again and was confused. It all fit so well together, like a puzzle. The language was simple, so simple I could plainly understand its meaning, yet it was still beautiful. I was now fascinated by the idea of poetry, words that had the power to make or break a person's world.

        I have since fallen in love with other poems, but “Patty Poem” remains my poem. After all, “Patty Poem” gave me my love for poetry not because it was the poem that lifted my spirits, but because it was the one that hurt me the most.