5) Which of these is most abundant in the plasma membrane? A) proteins B) carboh

Question

5) Which of these is most abundant in the plasma membrane? A) proteins B) carbohydrates C) cholesterol D) phospholipids 6) If a liver cell were to be placed in a beaker with a solution containing the same solute concentration as that found inside the cell, we would say that the beaker contained a(n) solution. B) hypertonic C) isotonic D) hypotonic 7) You have a bacterial infection. Your immune system will be able to distinguish this foreign invader from other cells by A) recognizing cell adhesion molecules (CAMs) B) finding glycolipids on the plasma membrane C) identifying glycoproteins on the plasma membrane D) determining the presence or absence of a nucleus 8) When bacteria appear in tissues, a type of large cell engulfs and destroys them. Which process are these cells using to engulf the bacteria? A) exocytosis B) active transport C) pinocytosis D) phagocytosis 9) Which of the following is a membranous organelle that chemically modifies and ships proteins to other organelles or out of the cell? A) lysosome B) chloroplast C) mitochondria D) Golgi complex 10) Most of the energy used by the cell is converted to ATP in B) Golgi complexes C) nuclei D) mitochondria

Explanation / Answer

5) The correct option is D. Phospholipids.

Phospholipids molecules are most abundant in the plasma membrane. They are a major element of all cell membranes. They form lipid bilayers because of their amphiphilic features.

6) The correct option is C. Isotonic.

An isotonic solution have the same osmotic pressure across a semi-permeable membrane. It permits for the free movement of water across the membrane without changing the concentration of solutes on either side.

7) The correct option is C. identifying glycoproteins on the plasma membrane.

Many receptors as glycoproteins are present on the cell surface. Glycoproteins don't just bind other glycoproteins and also bind other types of molecules. Such as, viruses use glycoproteins to bind to a target host cell.

8) The correct option is D. Phagocytosis.

Phagocytosis is a process by which living cells as phagocytes ingest and engulf other cells or particles. The phagocytes may be a free-living, such as an amoeba and white blood cell in the body.

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