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Unit 2: Revision Cell structure & function Rasha Ibrahim 2016-2017 Port Said International Schools Better Education for Future Generations Science Department Unit 2: Cell function &structure Grade: 10 WORKSHEET UNIT (2) 1-Choose the correct answer from each of the following: 1- Cell wall is formed from ………. organic compound A- Lipids B- Glucose C- Phosphoproteins 2- Cell membrane is composed of …….. A- Phospholipids bi-layer C- Chitin bi-layer D- Cellulose B- Cellulose layer D- Glycoprotein bi-layer 3- ……. are responsible for protein synthesis process in living cells. A- Mitochondria B- Lysosomes C- Cytoskeleton D- Ribosomes 4- Centrosome exists in all animal cells except for….. A- Nerve cells B- Sperm cells C- Liver cells D- Muscle cells 5- Chromosomes are formed in ……. Stage of cell division A- Anaphase B- Metaphase C- Telophase D- Prophase 6- …….. form cilia and flagella in animal cells A- Centrosome B- Mitochondria C- Lysosome D- Ribosome 7- ………. is responsible for generating energy in cell A- Centrosome B- Mitochondria C- Lysosome D- Ribosome 8- ……….is responsible for digesting nutrients in the cell. A- Centrosome B- Mitochondria C- Lysosomes D- Ribosomes 9-……. are plastids which are devoid of pigments A- Leucoplasts B- Chromoplasts C- Chloroplasts D- Chromatin 10- All the following organelles exist in animal cells except …….. A- Cell wall B- Cell membrane C- Mitochondria D- Lysosomes 11 ………. cells do not have true nuclei. A- Bacteria B- Monera D- Animals C- Plants 12- The tissue, which is responsible for storing nutrients in plants A- Parenchyma B- Sclerenchyma C- Collenchyma D- Phloem 12- Cell walls of Collenchyma tissues cells are thickened with ………. A- Lignin B- Cellulose C- Chitin D- Glucose 13- The solid tissue is known as ……….. A- Sclerenchyma B- Collenchyma C- Epithelium D- Parenchyma 14- The cell walls of Sclerenchyma tissue cells are thickened with…….. A- Lignin B- Cellulose C- Chitin D- Glucose 15- The tissue, which is responsible for transporting water and salts from roots to leaves. A- Xylem B- Phloem C- Sclerenchyma D- Parenchyma 16- The plant tissue, which transport nutrients from leaves to all plant parts. A- Collenchyma B- Sclerenchyma C- Xylem D- Phloem 17- An epithelial tissue, which forms the lining of capillaries A- Simple columnar epithelial tissue B- Simple vascular epithelial tissue C- Simple squamous epithelial tissue D- Stratified squamous epithelial tissue 18- A tissue formed from one layer of flat cells. A- Simple columnar epithelial tissue C- Simple squamous epithelial tissue B- Simple vascular epithelial tissue D- Stratified squamous epithelial tissue 19- A tissue forming kidney tubules. A- Simple columnar epithelial tissue C- Simple squamous epithelial tissue B- Simple vascular epithelial tissue D- Stratified squamous epithelial tissue 20- Tissues which support the body. A- Skeletal connective tissues C- Simple squamous epithelial tissue B- Vascular connective tissues D- Stratified squamous epithelial tissue 21- ……… are formed from non-striated involuntary muscle fibers A- Smooth muscles B- Skeletal muscles C- Cardiac muscles D- Skeletal connective tissues 22- ……… are formed from striated voluntary muscle fibers A- Smooth muscles B- Skeletal muscles C- Cardiac muscles D- Skeletal connective tissues 2-Write the scientific term 1- A cell that doesn't have a true nucleus and most cellular organelles (……………..……..). 2- A cell which has a true nucleus and many cellular organelles (……………………). 3- A structure which is responsible for synthesizing proteins (……………………). 4- A structure which is responsible for synthesizing lipids (……………………). 5- A structure responsible for digesting nutrients (…………..………..). 6- Pigments which exist in chromoplasts (……………………). 7- A pigment which exists in chloroplasts (……………………). 8- Thin filaments coiled around each other which turn into chromosomes during cell division process (……………………). 9- A living tissue composed of irregular cells with thin walls and intracellular distances between them for aeration (…………….…….). 10- A living tissue composed of rectangular cells, its wall is not thickened with Lignin but with cellulose (……………………). 11- A tissue, which supports the plant and protect the inner tissues (……………………). 12- A tissue which covers the outer surface of the body to protect it from outer stimuli (Temperature, Dryness, Microbes,) or line the body from the inside (……………………). 13- A tissue whose cells are relatively distant and it has a solid, liquid or semi-solid intracellular material (…………………..). 14- A tissue, which is known as muscular cells or fibers, it has the ability to contract and relax (which doesn't exist in all body cells (………………….) 15-Muscles which are composed of involuntary non-striated muscle fibers(………………). 16- They are composed of striated voluntary muscles, they are usually found attached to the skeleton (………………….). 17- They are composed of striated involuntary muscles, they are found in the walls of the heart only (………………...). 4-Give reason(s) for each of the following: 1- Plant cells have definite shapes. ………………………………………………………………………………………………… ………………………………………………………………………………………………… 2- Cell membrane is in liquid state. ………………………………………………………………………………………………… ………………………………………………………………………………………………… 3- Cell membrane is cohesive. ………………………………………………………………………………………………… ………………………………………………………………………………………………… 4- The importance of nuclear membrane in nucleus. ………………………………………………………………………………………………… ………………………………………………………………………………………………… 5- Plasma membrane plays an important role in cell. ………………………………………………………………………………………………… ………………………………………………………………………………………………… 6- Nucleus is the most important organelle in the cell. ………………………………………………………………………………………………… ………………………………………………………………………………………………… 7- Ribosome plays an important role in cell. ………………………………………………………………………………………………… ………………………………………………………………………………………………… 8- The importance of ribosome ,which exist in the cytoplasm. ………………………………………………………………………………………………… ………………………………………………………………………………………………… 9- The importance of ribosomes,which exist in the endoplasmic reticulum. ………………………………………………………………………………………………… ………………………………………………………………………………………………… 10- Centrosome plays an important role in animal cells. ………………………………………………………………………………………………… ………………………………………………………………………………………………… 11- The importance of the smooth endoplasmic reticulum. ………………………………………………………………………………………………… ………………………………………………………………………………………………… 12- The importance of rough endoplasmic reticulum. ………………………………………………………………………………………………… ………………………………………………………………………………………………… 13- Golgi bodies play an important role in cells. ………………………………………………………………………………………………… ………………………………………………………………………………………………… 14- The importance of Lysosomes in cells. ………………………………………………………………………………………………… ………………………………………………………………………………………………… 15- The importance of Lysosomes in white blood cells ………………………………………………………………………………………………… ………………………………………………………………………………………………… 16- Cell is not affected by the digestive enzymes of Lysosomes. ………………………………………………………………………………………………… ……………………………………………………………………………………………….. 17- Mitochondria have folds in their inner membranes called Cristae. ………………………………………………………………………………………………… ………………………………………………………………………………………………… 18- Most cells have vacuoles ………………………………………………………………………………………………… ………………………………………………………………………………………………… 19- Bacteria are prokaryotes ………………………………………………………………………………………………… ………………………………………………………………………………………………… 20- Human cells are eukaryotic cells ………………………………………………………………………………………………… ………………………………………………………………………………………………… 21- There are many Golgi bodies in glandular cells ………………………………………………………………………………………………… ………………………………………………………………………………………………… 22- Parenchyma tissues play an important role in plants. ………………………………………………………………………………………………… ………………………………………………………………………………………………… 23- Collenchyma tissues are very important in plants. ………………………………………………………………………………………………… ……………………………………………………………………………………………… 24- The biological importance of Sclerenchyma tissues. ………………………………………………………………………………………………… ………………………………………………………………………………………………… 25- Xylem is from the most important tissues in plants and trees. ………………………………………………………………………………………………… ………………………………………………………………………………………………… 26- Phloem is from the most important tissues in plant and trees. ………………………………………………………………………………………………… ………………………………………………………………………………………………… 27- In phloem tissues, there are living cells attached to these tissues. ………………………………………………………………………………………………… ………………………………………………………………………………………………… 28- Epithelial tissues cover the outer surface of living organisms ………………………………………………………………………………………………… ………………………………………………………………………………………………… 29- Epithelial tissues line the small intestines of living organisms ………………………………………………………………………………………………… ………………………………………………………………………………………………… 30- Epithelial tissues exist in cavities such as digestive canal and air trachea ………………………………………………………………………………………………… ………………………………………………………………………………………………… 31- The biological importance of vascular connective tissues ………………………………………………………………………………………………… ………………………………………………………………………………………………… 32- Skeletal muscles are so-called (called by this name) ………………………………………………………………………………………………… ………………………………………………………………………………………………… 33- Cardiac muscles are found attached to intercalated disks. ………………………………………………………………………………………………… ………………………………………………………………………………………………… 4-Rewrite the following statements after correcting the underlined word: 1-Xylem tissue consists of vessels, tracheids and collenchyma cells. 2-Skeletal muscles are found in the wall of the digestive canal. 3-Cytoplasm passes through companion cells into sieve tubes in the form of cytoplasmic strands. 4-Epithelial tissues consist of somewhat distant cells and immersed in an interstitial or intercellular substances. 5-Nervous tissues are one of the tissues that have the ability of contraction and relaxation. 6-Cellulose substance deposits on the cell walls of vessels. 7-Human skin epidermis consists of simple columnar epithelial tissue. 8-Simple cuboidal tissue is found in lining of blood capillaries.
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