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Multiple choice Membranes and Transport
- 1. 11 4 Cell membranesand transport Click on the correct answer to each question. 1 The diagram shows a small part of a cell surface membrane. 1 2 3 4 Which regions are hydrophobic? A 1 and 2 only B 1 and 4 only C 2 and 3 only D 3 and 4 only 2 The diagram shows part of a cell surface membrane. In addition to the molecules shown, cholesterol is also present. D C B A In which region is cholesterol found? Multiple-choice test © Cambridge University Press 2013 Multiple-choice test: Chapter 4
- 2. 22 3 Whichcomponent of a cell surface membrane allows the movement of ions across the membrane? A cholesterol B fatty acids C phospholipid D protein 4 The molecules which make up biological membranes have different functions. Which row matches molecules with their functions? Separating dissolved ions Transporting ions Stabilising the hydrophobic layer Recognising self and non-self A cholesterol glycoprotein phospholipid protein B glycolipid phospholipid protein cholesterol C phospholipid protein cholesterol glycoprotein D protein cholesterol glycoprotein phospholipid 5 A substance moves into a cell through a protein pore. Which of the following describes this movement? A an ion moving against its concentration gradient by active transport B glucose moving down its concentration gradient by diffusion C oxygen moving against its concentration gradient by facilitated diffusion D carbon dioxide moving against its concentration gradient by osmosis Multiple-choice test: Chapter 4 © Cambridge University Press 2013
- 3. 33 6 Whichof the following correctly describes the movement of water by osmosis? A from a region of higher water potential to a region of lower water potential through a fully permeable membrane B from a region of higher water potential to a region of lower water potential through a partially permeable membrane C from a region of lower water potential to a region of higher water potential through a fully permeable membrane D from a region of lower water potential to a region of higher water potential through a partially permeable membrane 7 Which of the processes that transport materials across a cell surface membrane require energy from the cell’s supply of ATP? Key: = requires energy from ATP = does not require energy from ATP Endocytosis Exocytosis Facilitated diffusion Osmosis A B C D 8 A protein is synthesised by a ribosome in an animal cell. What is the sequence of events leading to the secretion of the protein by exocytosis? 1 protein modified by the Golgi apparatus 2 protein enters the endoplasmic reticulum 3 secretory vesicles fuse with the cell surface membrane 4 secretory vesicles formed by the Golgi apparatus 5 vesicles bud off from the endoplasmic reticulum A 1 → 2 → 5 → 4 → 3 B 2 → 5 → 1 → 4 → 3 C 3 → 4 → 1 → 5 → 2 D 5 → 4 → 3 → 2 → 1 © Cambridge University Press 2013 Multiple-choice test: Chapter 4
- 4. 44 9 Examplesof the bulk transport of materials into or out of cells are listed. 1 white blood cell engulfing a bacterium 2 plant cell building up its cell wall 3 pancreas cell releasing digestive enzymes 4 ovum taking up liquid nutrients from a follicle cell Which are examples of exocytosis? A 1 and 2 only B 1 and 4 only C 2 and 3 only D 3 and 4 only 10 A small piece of plant tissue was placed into each of three solutions, P, Q and R. After one hour, the tissues were examined using a light microscope and the appearance of the cells was recorded. P Q R What conclusion can be made about the water potentials of the three solutions? A The water potential of P is greater than that of R. B The water potential of Q is greater than that of R. C The water potential of R is greater than that of P. D The water potential of Q is greater than that of P. Multiple-choice test: Chapter 4 © Cambridge University Press 2013