问题
单项选择题
下列有关核酸与遗传物质关系的叙述,不正确的是()
A.DNA是绝大多数生物的遗传物质
B.有的生物的遗传物质是RNA
C.在真核生物中,DNA和RNA都是遗传物质,其中DNA是主要的遗传物质
D.核酸是所有生物的遗传物质,其中DNA是主要的遗传物质
答案
参考答案:C
下列有关核酸与遗传物质关系的叙述,不正确的是()
A.DNA是绝大多数生物的遗传物质
B.有的生物的遗传物质是RNA
C.在真核生物中,DNA和RNA都是遗传物质,其中DNA是主要的遗传物质
D.核酸是所有生物的遗传物质,其中DNA是主要的遗传物质
参考答案:C
阅读理解。 | |
China, red can be a happy color. But in some other countries, people think that red is an angry color. Colors are sometimes called hot, cold and neutral (中性的). Red and yellow are hot colors. They make a room feel warmer. They make people feel excited. Blue and green are cold colors. They make a room feel cooler. They make people feel calm. Brown and gray are neutral colors. They don't affect (影响) our feelings. 根据短文内容,判断句子正(T)误(F)。 ( ) 1. Yellow and red are hot colors. ( ) 2. Blue and green make us feel calm. ( ) 3. Colors can affect our feelings. ( ) 4. Brown is a neutral color. ( ) 5. Color isn't important in our lives. |