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#1 2012-04-03 02:50:56

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Registered: 2012-03-16
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Cell Biology Interview Questions And Answers

Medical Science :: Cell Biology Job Interview Questions and Answers

Cell Biology Interview Questions and Answers will teach us now that The cell is the basic structural and functional unit of all known living organisms. It is the smallest unit of life that is classified as a living thing, and is often called the building block of life. Some organisms, such as most bacteria, are unicellular. So learn every thing about the Cell Biology with this Cell Biology Interview Questions with Answers guide

1 ► What is the difference between plasma membrane and cell wall?
2 ► What are the chemical substances that compose the plasma membrane?
3 ► Do bacteria cells have nucleus?
4 ► Is there any bacteria made of more than one cell?
5 ► What is the plasma membrane of the cell? What are its main functions?
6 ► What are the two big groups into which cells are classified?
7 ► In 1665 Robert Hooke, an English scientist, published his book Micrographia, in which he described that pieces of cork viewed under the microscope present small cavities similar to pores and filled with air. Based on later knowledge of what were the walls of those cavities constituted? What is the historical importance of that observation?
8 ► Are there living beings without cell?
9 ► What is the cell theory?
10 ► What are the main respective constituents of cell walls in bacteria, protists, fungi and plants?
11 ► Do membranes form only the outer wrapping of cells?
12 ► Which type of cell came first in evolution the eukaryotic cell or the prokaryotic cell?
13 ► Concerning the presence of nucleus what is the difference between animal and bacterial cells?
14 ► What are the three main parts of a eukaryotic cell?
15 ► What are the main structures within the cell nucleus?
16 ► What are the substances that constitute the chromatin? What is the difference between chromatin and chromosome?
17 ► How is the fluid that fills the nucleus called?
18 ► Of what substances is the nucleolus made? Is there a membrane around the nucleolus?
19 ► What is the name of the membrane that delimits the nucleus? To which component of the cell structure that membrane is contiguous?
20 ► What are the main cytoplasmic structures present in animal cells?
21 ► What are cytoplasmic inclusions?
22 ► Where in the cell can ribosomes be found? What is the main biological function of ribosomes?
23 ► What is the difference between smooth and rough endoplasmic reticulum?
24 ► A netlike membranous complex of superposed flat saccules with vesicles detaching from the extremities seen in electronic microscopy. What is the observed structure? What is its biological function?
25 ► On which organelle of the cell structure does intracellular digestion depends? What is the chemical content of those organelles?
26 ► Why lysosomes are know as the cleaners of the cell waste?
27 ► Which are the cell organelles that participate in the cell division and in the formation of cillia and flagella of some eukaryotic cells?
28 ► What are the morphological, chemical and functional similarities and differences between lysosomes and peroxisomes?
29 ► What are mitochondria? What is the basic morphology of these organelles and in which cells can they be found?
30 ► Why can mitochondria be considered the power plants of the aerobic cells?
31 ► What is the endosymbiotic hypothesis about the origin of mitochondria? What are the molecular facts that support the hypothesis? To which other cellular organelles the hypothesis can also be applied?
32 ► What are the main components of the cytoskeleton?
33 ► What are the functions of the cytoskeleton?
34 ► What are chloroplasts? What is the main function of chloroplasts?
35 ► What is the molecule responsible for the absorption of photic energy for photosynthesis? Where is that molecule located in photosynthetic cells?
36 ► What are the colors (of the electromagnetic spectrum) absorbed by plants? What would happen to photosynthesis if the green light waves that reach a vegetable were blocked?
37 ► What is the way followed by the energy absorbed by plants to be used in photosynthesis?
38 ► Of what substance the plant cell wall is made? Is that substance a polymer made of which monomer?
39 ► What is the function of the plant cell wall?
40 ► What are plant cell vacuoles? What are their functions? How is the covering membrane of the vacuoles called?
41 ► What is a membrane?
42 ► Concerning their permeability how are membranes classified?
43 ► What is diffusion?
44 ► What is meant by concentration gradient? Is it correct to refer to concentration gradient of water?
45 ► What is the difference between osmosis and diffusion?
46 ► What is osmotic pressure?
47 ► Can solutions with same concentration of different solutes have different osmotic pressures?
48 ► How are solutions classified according to their comparative tonicity?
49 ► Concerning permeability what type of membrane is the cell membrane?
50 ► What are the basic constituents of the cell membrane?
51 ► What are the respective functions of phospholipids, proteins and carbohydrates of the cell membrane?
52 ► What are differentiations of the cell membrane?
53 ► What is the relation between concentration gradient and active and passive transport?
54 ► What are the three main types of passive transport?
55 ► What is the energy source used in active transport through biological membranes?
56 ► What is the difference between simple and facilitated diffusion? Facilitated by which type of molecule does the term facilitated mean?
57 ► How does the intensity of simple diffusion vary in relation to the concentration gradient of the moved substance?
58 ► How does the intensity of facilitated diffusion vary in relation to the concentration of the moved substance? What is the limiting factor?
59 ► Without saturation of transport proteins and under same concentration gradient how can the speed of simple diffusion be compared to the speed of facilitated diffusion?
60 ► How does facilitated diffusion present similarities with enzymatic chemical reactions?
61 ► What are some examples of biological activities in which osmosis plays important role?
62 ► What do facilitated diffusion and active transport have in common? What are the differences between them?
63 ► Which are the molecules that make possible active transport through membranes?
64 ► How does the sodium-potassium pump present in the cell membrane work? What is the importance of this protein for the cell?
65 ► What is mass transportation across the cell membrane?
66 ► What are the two main types of endocytosis?
67 ► How does the plant cell wall react when it is placed under hypotonic medium?
68 ► What is meant by suction force of the plant cell? Does the suction force facilitate or make difficult the entrance of water in the cell?
69 ► What is the wall resistance of plant cells? Does this resistance facilitate or make it difficult the entrance of water in the cell?
70 ► What does the formula DPD = SF - TP mean?
71 ► What are the values of DPD for plant cells under hypertonic, isotonic and hypotonic media?
72 ► What is the formula of the DPD for withered (shrank) plant cells? How is that situation possible?
73 ► What is deplasmolysis of plant cells?
74 ► Why are salt and sugar used in the production of dried meat and dried fruits?
75 ► What is cytoskeleton? What are its main constituents in animal cells?
76 ► Of which substance are microtubules made? In which structures and cellular processes do microtubules participate?
77 ► Of which substance are microfilaments made? What are the properties of these elements that give motility to cells?
78 ► What are cell movements? How are these movements created?
79 ► What are cilia and flagella? How do these structures acquire movement? What are some examples of ciliated and flagellated cells in humans?
80 ► How do the amoeboid movements occur? What are examples of beings and cells that use such movements for locomotion?
81 ► What are some examples of movement created by the contraction of sarcomeres of the muscle cells?
82 ► What is cyclosis?
83 ► What is meant by cellular secretion?
84 ► Which cell organelles are well-developed in secretory cells?
85 ► How do the rough endoplasmic reticulum and the Golgi apparatus act in the production and releasing of proteins?
86 ► What are some examples of secretory cells?
87 ► What is extracellular digestion?
88 ► What is intracellular digestion?
89 ► What is the main cell organelle involved in cell digestion? What are the properties of that organelle that enable it to the task?
90 ► What is heterophagic intracellular digestion? How is this process accomplished?
91 ► What is autophagic intracellular digestion? Why is this type of intracellular digestion intensified in an organism undergoing starvation?
92 ► What are some biological examples in which lysosomic enzymes play fundamental role?
93 ► How are cells with delimited nucleus called? What are the main elements of the nucleus?
94 ► Do all eukaryotic cells have nucleus and only one nucleus?
95 ► Of which substances is chromatin made?
96 ► What are heterochromatin and euchromatin?
97 ► What is the relation between the concepts of chromatin and chromosome? Are euchromatin and heterochromatin part of chromosomes?
98 ► In the phase when the cell is not dividing (interphase) is there activity within the cell nucleus?
99 ► How are the concepts of chromosome, chromatin and chromatids related? In which phase of the cell cycle does DNA duplicate?
100 ► What is the structure that maintains identical chromatids bound?
101 ► How the chromosome region where the centromere is located is called? How are chromosomes classified in relation to the position of their centromere?
102 ► What are the primary and the secondary constrictions of a chromosome? What is the other name given to the secondary constriction?
103 ► What are homologous chromosomes? Which are the human cells that do not have homologous chromosomes?
104 ► What is the difference between the concepts of karyotype and genome?
105 ► Can two normal individuals of the same species with sexual reproduction have identical genomes and identical karyotypes? How the human karyotype is usually represented?
106 ► What is the other name given to sex chromosomes? What is the function of sex chromosomes?
107 ► How many chromosomes does a human normal haploid cell have? How many chromosomes does a human normal diploid cell have? How many are the sex chromosomes within each of them?
108 ► Do phylogenetically proximal species have cells with proximal chromosome counts?
109 ► What is the nucleolus?
110 ► Of which structures is the nuclear membrane composed?

2012-04-03 02:50:56

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