Put ticks in the table to show whether each statement is true or false about the structure of RNA.
| Statement about RNA | True | False |
|---|---|---|
| RNA is typically single-stranded. | ||
| RNA contains the sugar ribose instead of deoxyribose. | ||
| In RNA, the base thymine (T) is replaced by uracil (U). | ||
| RNA is a polymer made of amino acids. | ||
| RNA molecules are generally much longer than DNA molecules. |
Draw lines to connect the cell type to its cell wall characteristic, and then to the presence of chloroplasts.
Complete these sentences about preparing and viewing specimens under a light microscope.
Choose words from the list: cover slip**, eyepiece, high power, light source, stage, **stain
(i) To make transparent cell structures visible, a chemical called a ...........................\text{...........................}........................... is added to the specimen.
(ii) The specimen on the slide is covered gently with a thin piece of glass called a ...........................\text{...........................}............................
(iii) The lens at the top of the microscope that you look directly through is called the ...........................\text{...........................}........................... lens.