Human Biology Unit 1 Challenge 2.docx. ALL QUESTIONS WITH ACCURATE ANSWERS. GRADED A+

Document Content and Description Below

Question 1 Which of the following statements is true?  a.) All cells contain DNA in the nucleus.  b.) On rare occasions cells result from the spontaneous combination of molecules.  c.)... Some organisms are not made up of cells.  d.) No living thing is smaller than a cell. Which of the following statements is true?  a.) All cells come from preexisting cells.  b.) Most prokaryotes do not have a nucleus, but some do.  c.) All cells have flagella.  d.) All cells are eukaryotes. Which is a component of all cells?  a.) Flagellum  b.) Cytoplasm  c.) Nucleus  d.) Tissue Question 2 Which of the following is a characteristic of the plasma membrane?  a.) It is composed strictly of a double layer of phospholipids.  b.) It allows only polar molecules to pass in and out of the cell.  c.) It is selectively permeable, meaning it controls what goes into and what comes out of the cell.  d.) The hydrophilic tails of the phospholipids face outward, composing the outer layer of the plasma membrane. Which of the following is a characteristic of the plasma membrane?  a.) It produces energy for the cell.  b.) It is made of two layers of phospholipids.  c.) It is a rigid outer barrier for the cell.  d.) It allows all kinds of molecules to pass through. Which of the following is a characteristic of the plasma membrane?  a.) It is composed of a single layer of phospholipids that allows the plasma membrane to be effective, yet flexible.  b.) Each phospholipid is compo [Show More]

Last updated: 1 year ago

Preview 1 out of 11 pages