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By: Hessa Habib

Published in: Technology, Health & Medicine
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  1. 1. The Student Quiz HB (cytoplasm and cell membrane) Circle the correct answer: 1- The cell’s components are: a. Inorganic materials such as water and organic materials such as nucleic acid b. cell membrane and cytoskeleton c. organic materials such as water and inorganic materials such as protiens 2- Carbohydrates contains C,H ,O only: a. 4% b. 1% c. 10% 3- Human’s cell’s are called __________. a. eukaryotes b. prokaryotes c. WBC 4- When surrounds the organelles it is called as nuclear envelope, Golgi or mitochondrial membrane. a. Cytoskeleton b. cell membrane c. carbohydrates 5-plasma membrane components: a. phospholipids, proteins, carbohydrates, cholesterol b. phospholipids, proteins, carbon, cholesterol c. phosphate, proteins, carbohydrates, cholesterol
  2. 2. 6- glycoprotiens and glycolipids makes up: a. cell membrane b. plasma membrane c. carbohydrates 7- Cholesterol: a. increases the stability of the cell membrane. b. prevents the loss of fluids or liquids at low tempreture. c. both a and b 8- Circle the correct answer (may be more than 1 answer): a. Inner surface of plasma membrane more negatively charged than outer surface b. many molecules are more concentrated eg. extracellular K+ more than intercellular K+ c. Plasma membrane is a flexible boundary between external and internal environment 9-Cell markers that allow self-identification of cells in body a. cell membrane b. cytoplasm c. none of the above (the correct answer is receptor proteins)
  3. 3. 10- Anchor intracellular cytoskeleton to extracellular matrix a. linker protein b. receptor protein c. integrins 11-The permeability of a membrane: a. Is independent b. Depends on the size , nature and concentration c. Is zero ,not permeable 12-In facilated transport: a. There is no need for energy b. It requires energy c. Proteins are carried from low concentration to high concentration 13-The incorporation of materials from outside the cell by the formation of vesicles in the plasma membrane a. exocytosis b. endocytosis c. diffusion 14- exocytosis: a. Doesn’t require a signal to stimulate the secretion of vesicle b. Requires a signal to stimulate the secretion of vesicle c. None of the above
  4. 4. 15-___________ perform metabolic, synthetic, energy- requiring and energy- generating functions of the cell. a. cytoplasmic matrix b. organelles c. inclusions 16-The glycogen breakdown is called: a. glycocolix b. glycolysis c . cystol 17- All of the following are membranouse organelles except (can be more than one answer): a. lysosomes b. mitochondria c. centeriols 18- Ribosomes are produced by: a. sER and nucleous b. rER and endoplasmic reticulum c. rER and nucleolus 19- Abundant in cells specialised in lipid, steroid and glycogen production a. rER b. sER c. Golgi apparatus
  5. 5. 20- Autophagy is : a. digestion of old organells b. destruction of own cell when cell is injured. c. digestion of foreign materials Fill in the blanks: 1- Immature or cis face is ……….Mature or trans face is …………… 2- Sorting and distribution of protein to their final destination are functions of the ……………… 3- Lysosomal enzymes are secreted in ………….and then transported to …………..where they are modified and packed. 4- Indigestible materials are called ……………. that are released out of the body. 5- Large quantities of Residual bodies accumulate in heart, muscle and nuerons and form intracellular pigments such as………………… Write T for true and F for false and if it’s F write the correct answer. 1- Prexisomes are self replicating, like the mitochondria, not formed in the Golgi complex. ( ) 2- Peroxisomes are numerous in the kidney where toxic substance are going to accumulate. ( ) 3- The outer membrane acts by passive diffusion, while the inner membrane acts by active transport to prevent diffusion of the contents of the mitochondrial matrix. ( ) 4- Cytoskeleton is the structure that fills the cytoplasm and is important for movement and stability of the cell. ( ) 5- Microfilaments are composed predominantly of a contractile protein called myosin. ( ) 6- Intermediate filaments are either free in the cytoplasm or involved in building up other organelles such as cilia. ( ) 7- Centeriols are absent in animals. ( ) Done by :Hessa Habib