What Defines a Cell? Figure 1: Transport proteins in the cell membrane A plasma membrane is permeable to specific molecules that a cell needs. Transport proteins in the cell membrane allow for selective passage of specific molecules from the external environment. Each transport protein is specific ...
What is the primary function of the cell membrane?A. to store nutrients B. to regulate the movement of molecules in and out of the cell C. to produce energy for the cell D. to maintain the shape of the cell 相关知识点: 试题来源: 解析 答案:B ...
A cell can replicate itself independently. Hence, they are known as the building blocks of life. Each cell contains a fluid called the cytoplasm, which is enclosed by a membrane. Also present in the cytoplasm are several biomolecules like proteins, nucleic acids and lipids. Moreover, cellular...
What provides rigidity and support to plant cells? A. Cell membrane B. Chloroplast C. Cell wall D. Nucleus 相关知识点: 试题来源: 解析 C。解析:文章中明确提到“Plant cells have a distinct cell wall that provides rigidity and support.”,即植物细胞有独特的细胞壁提供刚性和支撑。反馈 收藏 ...
Without a cell membrane, you arguably wouldn't have any cells. The cell membrane holds the contents of the cell together, and regulates what can get in and out. It is incredibly complex, with scientists continually learning new pieces of information everyday....
The endoplasmic reticulum helps in the manufacture of fat molecules or lipids. These proteins and lipids help in the building of the cell membrane. This process is known as membrane biogenesis.
Cell membrane:The cell is composed of various components that provide it with functional and structural characteristics. All the organelles are contained inside the cell, suspended in the cytoplasm and outlined by a double-layered structure known as the cell membrane or plasma membrane....
Integral membrane proteins are are embedded within the cell membrane and project into the cell or the external environment. An integral membrane protein that spans the entire cell membrane, from the outer surface of the cell to the inner surface of the cell, is called a transmembrane protein. ...
Pilli –These are structures attached to the cell which look like hairs. These allow other unicellular species to connect and link the cytoplasm of each together Plasma Membrane – A thin layer of protein that covers the cell Cell Envelope – Contains the cell wall and the cell membrane of th...
Deep in your cells is an…envelope! Learn what the nuclear membrane -- also called the nuclear envelope -- is, what it is made of and what it does...