What is a membrane?

880

---

what substances is the nucleolus made? Is there a membrane around the nucleolus?

875

---

What are the main respective constituents of cell walls in bacteria, protists, fungi and plants?

854

---

Why can mitochondria be considered the power plants of the aerobic cells?

1075

---

What is meant by concentration gradient? Is it correct to refer to “concentration gradient of water”?

832

---

What is the difference between plasma membrane and cell wall?

872

---

On which organelle of the cell structure does intracellular digestion depends? What is the chemical content of those organelles?

994

---

Why lysosomes are know as “the cleaners” of the cell waste?

914

---

Do membranes form only the outer wrapping of cells?

931

---

What is the difference between smooth and rough endoplasmic reticulum?

923

---

What are the main components of the cytoskeleton?

925

---

What are the main structures within the cell nucleus?

891

---

What are the chemical substances that compose the plasma membrane?

884

---

What are chloroplasts? What is the main function of chloroplasts?

893

---

what substance the plant cell wall is made? Is that substance a polymer made of which monomer?

968

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