Question

match the phrase with the correct word to fill in the blank.
instructions
the rough er is studded with ______
the main function of the rough er is ______ synthesis.
the main function of the smooth er is ______ synthesis.
lipid
ribosomes
protein

Explanation:

1. For "The rough ER is studded with ______", rough endoplasmic reticulum (ER) has ribosomes attached to its surface, so it should be matched with "ribosomes".
2. For "The main function of the rough ER is ______ synthesis", rough ER is involved in protein synthesis because of the ribosomes (which are protein - making sites) on it, so it should be matched with "protein".
3. For "The main function of the smooth ER is ______ synthesis", smooth ER is mainly responsible for lipid synthesis, so it should be matched with "lipid".

Answer:

• "The rough ER is studded with ______" matches with "ribosomes".
• "The main function of the rough ER is ______ synthesis" matches with "protein".
• "The main function of the smooth ER is ______ synthesis" matches with "lipid".