Biology > SOPHIA Milestone > Human Biology Unit 1 Challenge 2.docx. ALL QUESTIONS WITH ACCURATE ANSWERS. GRADED A+ (All)
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]
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