仅在真核细胞中存在而在原核细胞中不存在的细胞结构是以下那一项? A: Ribosome B: Cell wall C: Cell membrane D: Nucleus withmembrane

The envelope of an animal virus is derived from the ______ of its host cell. A: cell wall B: glycoproteins C: membrane D: receptors

The envelope of an animal virus is derived from the ( ) of its host cell. A: cell wall B: membrane C: glycocalyx D: receptors

Which of the following is incorrect regarding serous gonadal vesicles: A: The top of the cytoplasm contains eosinophilic secretory granules B: The basal cytoplasm is strongly basophilic C: The nucleus is oblate at the base of the cell D: At the base of the cell are a large number of parallel thick endoplasmic reticulum and mitochondria E: More ribosomes

The imbalance distribution of Na+ and K+ inside and outside the cell is due to () A: the high permeability of cell membrane to K+ in rest condition B: the increase of the permeability of the cell membrane to Na+ when excited C: the result that Na+ and K+ moving across the cell membrane by facilitated diffusion D: the effect of Na+ pump E: the effect of ATP