Cell Biology Cell structure 2012 e Tutor World

1. Which cells have a cell wall around them? • • Prokaryotic cells fungal

• . Name three types of elements that form Golgi complex. • C

Name the unit membrane that surrounds a vacuole. • Monoplast • Tonoplast • Pleuroplast

• Which of the following loses nucleus at maturity in a plant cell? • • Phloem Sieve plate Sieve Tube cells Parenchyma © 2012 e. Tutor. World Learning Solutions Private Limited, India, All rights reserved.

• What is the main function of centrioles? • To help in the organization of spindle fibres during cell division. • To help in the organization of chromosomes during cell division. © 2012 e. Tutor. World Learning Solutions Private Limited, India, All rights reserved.

• Which is the cell organelles enclosed by a double unit membrane? • • Mitochondria and plastids Plastid and ER Golgi Bodies and nucleus ER and Nucleus © 2012 e. Tutor. World Learning Solutions Private Limited, India, All rights reserved.

• Which is not correct statement for 70 S and 80 S ribosomes? • 70 s ribosomes are found in prokaryotic cells while 80 s ribosomes are found in eukaryotic cells. • 70 s ribosome has two sub units of 30 s and 50 s • 80 s ribosome has two subunits of 60 s and 40 s. • None of these © 2012 e. Tutor. World Learning Solutions Private Limited, India, All rights reserved.

Name the specific term for the following. a) Cluster of ribosomes in the cytoplasm. __P_____ b) Folds of the inner mitochondrial membrane. C_____ c) Stacks of closely packed thylakoids. _G_____ d) Stacked particles in the inner membrane of mitochondria. _________ © 2012 e. Tutor. World Learning Solutions Private Limited, India, All rights reserved.

Are there living beings without cells? • No • Yes Give reason © 2012

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