Cell Biology Quiz CELL ORGANELLES PDF

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Summary

1-Hydrolytic enzymes are many in:
a-nucleus
b-mitochondria
c-lysosome
d-golgi bodies...

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Quiz one 1-Hydrolytic enzymes are many in: a-nucleus b-mitochondria c-lysosome d-golgi bodies ans c 2. all of the following regarding Membranous organelles are true except -Covered with membrane -Isolated from cytosol -Include the endoplasmic reticulum d-all are double membrane ans d 3-One of the following is a single-membraned structure: a- golgi bodies b-Nucleus c- Mitochondria d- lysosomes ans d 4. Non membranous organelles Include all except a-microvilli b-centrioles c- ribosomes d-vacuoles

ans d 5. The Endoplasmic Reticulum (ER) a-Located away from nucleus. b -Contained cisternae. c- has three types . d-is the site where the genetic materials stored ans b 6-all the following regarding the Smooth endoplasmic reticulum is true except a-Is related to ribosomes b-It serves in lipids synthesis membrane lipids . c -Regulates calcium . d-Destroys toxic substances . ans a 7- Golgi apparatus (Golgi body) a-It is present only in animal cells. b-Have a shipping side & a receiving side c-Receive lipids made by ER

d- Materials are transported from nucleus to Golgi to the cell membrane by vesicles ans b .8 Functions of the lysosme incluses all except a-Clean Up inside Cells. b-Break down large molecules. c-Attack bacteria. d-synthesis of protein. Ans d 9.Mitochondria a-Mitochondria are formed of sacs and cisterna b-They are the power generator of the cell c-The number mitochondria needed by a cell is constant d-It is static ans b 10-Vacuoles a-Vacuoles in animal cell are larger than that of plant cells. b - It has a fixed size c- Vacuole has a complicated structure

d-Vacuoles are holders of much water in the cell ans

d

11-Ribosomes a-Are lipid synthesizers for the cell. b - Ribosomes are present eukaryotic cells only . c-In eukaryotic cells ribosomes are seen floating in cytosol. d-There are other ribosomes located on golgi apparatus ans c

12-.Centrioles a-Centrioles consist of three short cylinders of microtubules at right angles to each other and are involved in cell division b-They are composed of grouped microfilaments in animal cells. c-During replication, centrioles replicate in anaphase of mitosis d-They can be found in most of cells having the real nucleus. ans d 13.The cytoskeleton has the following except a-There are three types of filaments in the cytoplasm of most eukaryotic cells

b-Microfilaments-composed of actin c-- Intermediate filaments provide tensile strength for the cell. d-Microtubules-is important for muscle contraction ans d 14 in cell division all are true except a-Cells take their time to reach on maximum size and enter their division to give new cells. b -Released new cells are small but they grow rapidly -Cell division is made simple in prokaryotes but much complicated in eukaryotes. c-Prokaryotic cells simple in their nature, they contain a circular chromosomes, and nucleus. d-eukaryotic cells, have much complicated chromosomes ans c 15- in mitosis a-Genetic material is shared in different way in two daughter new cells. b-New cells are typically similar to their original cell. c- Before a cell begin its division, it doesn’t enter in interphase state d--daughter cells contain haploid chromosomes

ans b 16-in mitosis Prophase all occurs except a-chromosomes begin condensation b- Formation of mitotic spindles takes place. c-the breaking of nuclear membrane take place at this stage . d-A nuclear membrane forms ans d 17-in mitosis metapase a-the mature cell enters the spindle checkpoint process . b- Formation of mitotic spindles c-Formation of nuclear membrane d-Condensation of chromatine ans a 18-in mitosis the Anaphase a- Sister chromatids are pulled by spindles and leave central part to poles. b-The chromosomes are duplicated c-The nuclear membrane disappear

d-Check point occurs in this phase ANS A 19-Telophase of mitosis a-Is the first step of a cell division. b-When a cell finished dividing, they form 4 daughter c- mitotic spindles breaks d-Chromosomes are condensed ans c 20-Cytokinesis a-. Occurs in early phases of cell division. b- In animals, the cytoplasm is pinched and create cleavage c-Duplication of genetic material d-Nuclear membrane dissolves ans b

21- Meiosis a-Is type of cell division which produce nerve cells b-Diploid cells enter in meiosis division to produce diaploid cells. .

c- Meiosis has no similarity with mitosis in phases engaging cell division. d- in meiosis crossing over of homologous chromosomes occurs Ans d

22-In meiosis II, the phases include all of the following except: a-Cytokinesis b- metaphase II. c-interphase d- telophase II . Ans C 23-In meiosis Prophase I a- homologous chromosomes pair and exchange DNA to form recombinant chromosomes. b-chromosomes start to form strings and network c-Homologous chromosomes form pairs of chromosomes consisting of 6 chromatids d-Homologous chromosomes are attached by centrioles -ans a

24- Meiosis generates genetic diversity through: a-The exchange of genetic material between homologous chromosomes during Meiosis II b -The random alignment of maternal and paternal chromosomes in Meiosis I c-The check point I metaphase I d-the cytokinesis process ans b 25 in meiosis a-in Telophase I the homologous chromosomes are separated and move to the opposite poles of the cell. b- in Anaphase the chromosomes become diffuse and the nuclear membrane reforms c-cytokinesis occurs between anaphase and telophase d-Meiosis I is a reduction division ans d...