问题 选择题

下列关于光合作用和呼吸作用的叙述,错误的是(  )

A.呼吸作用的产物就是光合作用的原料

B.植物体的每个细胞均能进行光合作用和呼吸作用

C.光合作用的实质是合成储存能量的有机物,并释放氧气

D.呼吸作用的实质分解有机物,释放能量

答案

植物的光合作用是在叶绿体里利用光能把二氧化碳和水合成有机物,释放氧气,同时把光能转变成化学能储存在合成的有机物中的过程;而呼吸作用指的是细胞内有机物在氧的参与下被分解成二氧化碳和水,同时释放能量的过程,光合作用与呼吸作用的关系如表:

区别联系
场所原料条件产物能量
光合作用叶绿体二氧化碳、水有机物、氧气储存能量相互对立

相互依存

呼吸作用所有的活细胞有机物、氧气有无光皆可二氧化碳、水释放能量
A、呼吸作用的产物是二氧化碳、水,光合作用的原料是二氧化碳和水,A正确;

B、植物体的每个细胞均要进行呼吸作用,只要是活细胞都要进行呼吸作用,但是光合作用的细胞必须有叶绿体,如有些植物的细胞没有叶绿体就不能进行光合作用,B错误;

C、根据光合作用的表达式可知,光合作用的实质是合成储存能量的有机物,并释放氧,C正确;

D、根据呼吸作用的表达式可知,呼吸作用的实质分解有机物,释放能量,D正确.

故选:B.

阅读理解

阅读理解。

     More than seven hundred years ago, the Prince of Wales had a very big and brave dog called Gelert.

     One day the Prince went hunting with his men. He made his dog look after his baby son. The baby

was in a wooden cradle, which was like a small bed.

     When the Prince came back from hunting, Gelert ran out to meet his master. The Prince saw the blood on Gelert's jaws and head.

      He rushed into his house and looked for his baby son. The cradle was lying on its side on the floor.

The clothes were torn and there was blood on them.

     "So you have killed my son?" the Prince said angrily. He took out his sword and killed the dog.

      The Prince ran out of the house and saw his son lying on the ground unhurt. Near him was a dead

wolf. The Prince knew what happened.

      The Prince ran back into the house, but Gelert was dead. The Prince was very sad, because he had

killed his faithful friend. The Prince camed the body of his brave dog to the top of a mountain and buried

him there. After this, the Prince never smiled again.     .

       If you go to Wales, people will show you where Gelert is buried. It reminds people of a brave and

faithful dog.

1. Gelert was the dog of the Prince of______ .

A. Scotland

B. England

C. Ireland

D. Wales

2. The Prince made the dog ______when he was leaving.

A. watch the door

B. take care of his baby

C. welcome his friends

D. stop the strangers

3. The Prince was surprised to see blood on Gelert's ______.

A. jaws

B. paws

C. head

D. both A and C

4.The Prince found his baby son ______.

A. on the ground outside the house

B.in his bed

C. in a wooden cradle

D. in his house

5. The Prince never smiled again because______.

A.the wolf was killed by Gelert

B. he had buried the dog on the top of a mountain

C.he had killed his faithful friend Gelert

D. Gelert had killed his babv son

单项选择题 A1/A2型题