← Eukaryotic cells Test
2 Written Questions
2 Multiple Choice Questions
- site of protein synthesis. Ribosomes are particles of ribosomal RNA and protein. They are suspended freely in the cytoplasm or bound to endoplasmic reticulum.
A single cell, such as a human liver cell that produces large amounts of protein contains millions of ribosomes.
- contains chromosomes made of DNA that is wrapped with special proteins called histones into a chromatin network. Chromosomes contain genes - bits of DNA that code for polypeptides. The nucleus is surrounded by a selectively permeable double membrane or envelope that contains pores and allows for the transport of large molecules such as RNA out of the nucleus and into the cytoplasm.
2 True/False Questions
Lysosome → sac of hydrolytic (digestive) enzymes
endoplasmic reticulum → (ER) abrv.
system of membrane channels that traverse the cytoplasm. There are 2 varieties:
1. Rough ER
-studded with ribosomes, therefore site of protein synthesis
-transport through the cytoplasm
2. Smooth ER
-synthesizes steroid hormones and other lipids
-connects rough ER to the golgi apparatus
-detoxifies the cell
-carbohydrate (glycogen) metabolism