xam 2 fall 2015 Page 1 Name: 1 ll of the following are composed of eukaryotic cells XPT animals plants fungi bacteria 2 The function of the cytoplasm is to keep the cell contents wet provide a medium for chemical reactions communicate with the external environment 3 Phospholipids are important in membrane structure because their hydrophilic phosphate heads form a continuous surface on both sides of a membrane the hydrophilic fatty acid tails are exposed to the watery environments on either side of the membrane their hydrophobic phosphate heads align with hydrophobic portions of proteins to keep those proteins in place in the membrane none of the above is true 4 Which statement is false. prokaryotic cells have N prokaryotic cells have ribosomes prokaryotic cells have a nucleus prokarotic cells have a plasma membrane more than one of the above are false 5 The plasma membrane functions to allow a cell to communicate with its environment is semi-permeable contains embedded proteins 6 The cytoskeleton is an internal structure of cells that does not change is composed of protein fibers acts as an internal communication network in the cell 7 The cell controls the make up of the cytoplasm. 10/23/2015 11:19:28 M
xam 2 fall 2015 Page 2 8 The primary component of cytoplasm is sugar protein lipid water 9 n example of active transport is osmosis. 10 Which molecules can diffuse into or out of a cell? Oxygen arbon ioxide Small hydrophobic molecules 11 Insulin diffuses into cells opens channel proteins so glucose can diffuse into cells is an active transport mechanism 12 The picture depicts two solution of glucose ( is 25% glucose, is 55% glucose) with a semi-permeable membrane between them. Which of these is true? Water will flow from to Water will flow from to Glucose will flow from to Glucose will flow from to 13 iffusion of a substance occurs from a concentration to a concentration of the substance. low, high neutral, high high, neutral high, low 10/23/2015 11:19:28 M
xam 2 fall 2015 Page 3 14 Your white blood cells engulf bacteria by exocytosis endocytosis filipodia cell junctions 15 ytosol is to pure water. hypertonic hypotonic neither a nor b 16 ells can communicate with other cells in the body through filiopodia cell junctions signalling molecules 17 Osmosis is the movement of molecules down a concentration gradient the movement of molecules through a channel protein the movement of large, biologically important molecules across a membrane the movement of water across a membrane the active transport of molecules against a concentration gradient 18 cell is know to respond to a particular hormone. Which of the following must be true of this cell? it is in the heart muscle it responds to both nitric oxide and adrenaline it is also the site of production for this hormone it contains the receptor for the hormone it is an animal cell 19 xocytosis requires energy moves material across the plasma membrane moves material out of the cell 20 hypertonic solution has a lower solute concentration relative to another solution has a higher solute concentration relative to another solution has a solute concentration equal to another solution requires the input of energy 10/23/2015 11:19:28 M
xam 2 fall 2015 Page 4 21 In lab, you placed Lugol's solution in a test tube covered with dialysis tubing. You inverted the test tube into a beaker that contained a starch solution. The contents of the beaker (but not the test tube) turned blue-black because starch diffused out of the test tube starch diffused into the test tube Lugol's solution diffused out of the test tube Lugol's solution diffused into the test tube 22 Using the picture (figure 1 at the end of the exam), the organelle responsible for synthesizing proteins is 23 Using the picture (figure 1 at the end of the exam), the part labeled "" is composed of amino acids carbohydrates phospholipids nucleic acids fatty acids 24 Using the picture (figure 1 at the end of the exam), N is found in 25 N can pass through a nuclear pore 26 ll eukaryotic cells have a nucleus. 27 The main function of mitochondria is to produce energy produce N produce proteins produce lysosomes 10/23/2015 11:19:28 M
xam 2 fall 2015 Page 5 28 Information passes between the nucleus and the rest of the cell through nuclear pores nuclear envelopes nuclear vesicles 29 In a microscope, you observe an organelle that consists of a series of membrane sheets that appear to be connected to the outer membrane of the nucleus and the plasma membrane. What is the likely identity of this organelle? mitochondrion lysosome Golgi apparatus vacuole endoplasmic reticulum (R) 30 The Golgi apparatus is one destination for substances that have been packaged into transport vesicles by rough R. 31 The picture shows an animal cell as seen through a compound microscope with a magnification of 400x. The field of view is 400 micrometers across its diameter. The cell you see has a diameter of approximately 10 micrometers 50 micrometers 100 micrometers 500 micrometers 32 One function of rough R is to create new membrane. 33 The organelle responsible for cellular respiration is the chloroplast the lysosome the Golgi apparatus none of the above 10/23/2015 11:19:28 M
xam 2 fall 2015 Page 6 34 Which of the following do cells use to move through their environment? flagella ribosomes vesicles more than one of the above are used 35 gene is a segment of N codes for a particular trait is located within a chromosome 36 Looking at a human cell under the microscope, you notice that it has 23 chromosomes. You decide this cell must be from the stomach cancerous a gamete none of the above 37 single cell grows into a multicellular organism by the process of mitosis meiosis fertilization replication 38 ach chromosome contains four sister chromatids a single molecule of N the cell's genotype its own spindle fibers 39 Which answer represents the stages of mitosis in the correct order? prophase - metaphase - anaphase - telophase prophase - anaphase - metaphase - telophase metaphase - prophase - anaphase - telophase prophase - metaphase - telophase - anaphase 40 hromosomes line up during the portion of mitosis. anaphase S phase metaphase telophase 10/23/2015 11:19:28 M
xam 2 fall 2015 Page 7 41 Meiosis results in 2 identical daughter cells that are also identical to the parent cell. 42 ll of the following events occur in telophase XPT N condenses Mitotic spindle disappears Nuclear membrane reforms ll of the above occur. There are no exceptions listed. 43 44 How many chromatids are in a bivalent? (enter a number) The cell pictured could be in the following phase G1 prophase I prophase II telophase I 45 The cell in number 44 is haploid diploid triploid none of the above 46 In which phase does the law of independent assortment occur? metaphase I metaphase II telophase I telophase II 47 The cell pictured has how many chromosomes? (enter a number) 10/23/2015 11:19:28 M
xam 2 fall 2015 Page 8 48 The genotype of the cell in number 47 is ab a a 49 50 The cell in number 47 has how many homologous pairs of chromosomes? (enter a number) The cell in number 47 could be in which phase of the cell division cycle? prophase metaphase telophase anaphase 10/23/2015 11:19:28 M
xam 2 fall 2015 Page 9 nswer Key : xam 2 fall 2015 Question: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 nswer 4 (+/- 0.0%) 10/23/2015 11:19:28 M
xam 2 fall 2015 Page 10 45 46 47 48 49 50 4 (+/- 0.0%) 2 (+/- 0.0%) 10/23/2015 11:19:28 M