Tuesday, March 13, 2012

CELL BIOLOGY UPTO CHROMOSOMES ASSIGNMENT

1 The statement that protoplasm as active centre for various biological processes was given by




Ans:Von Mohl
2 [A]: Protoplasm shows Brownian movement
[R]: It has about 85 – 90% of water





Ans:Both A and R are true but R is not the correct explanation of A
3 Choose the incorrect statement with respect to protoplasm




Ans:Protoplasm is coagulated at 60°C because it has 88% of water
4 According to Trilamellar model




Ans:Protein and Lipid molecules are arranged in a total of 4 tiers
5 Cytosol is devoid of
I. Enzymes
II. Ribosomes
III. Vacuoles





Ans:II and III
6 The double membrane bound cell organelles of typical eukaryotic plant cell are
I. Mitochondria
II. Golgi complex
III. Endoplasmic reticulum
IV. Nucleus





Ans:I and IV
7 [A]: Blue-Green algae do not have plastids
[R]: They lack photosynthetic pigments





Ans:A is true but R is false
8 Endosperm of cereals has
I. Elaioplasts
II. Aleuroplasts
III. Amyloplasts
IV. Chromoplasts





Ans:II, III
9 According to Fluid Mosaic model, the matrix of cell membrane is mainly made of




Ans:Phosopholipids
10 Match the following





Ans:A - V, B - IV, C - III, D - II
11 Study the following table and choose the correct combination





Ans:II and III
12 Arrange the following events in correct chronological order of their discovery
I. Trilamellar model
II. Plastids
III. Nucleus
IV. Fluid Mosaic model





Ans:II, III, I, IV
13 [A]: Chloroplasts are described as semiautonomous cell organelles
[R]: Green plastids have their own DNA and ribosomes and can synthesize all of their proteins





Ans:A is true but R is false
14 The first discovered living cell was




Ans:Prokaryote
15 The microscope with high resolution is




Ans:Electron Microscope
16 The cell wall material distributed in all the three layers of cell wall is




Ans:Pectin
17 Match the following





Ans:A - III, B - V, C - IV, D - I
18 [A]: Flurescence microscope is a light microscope
[R]: Visible light is used to observe the object





Ans:A is true but R is false
19 Cell walls of isolated cells lack




Ans:Middle lamellum
20 Torus is thickened portion of




Ans:Middle lamellum of Pit region
21 Cell wall material not deposited by intussusception is




Ans:Cellulose
22 Cellulose forms the frame work of
I. Middle lamellum
II. Primary wall
III. Secondary wall





Ans:II and III
23 [A]: Chromosomes are stained with basic dyes
[R]: They have basic proteins known as Histones





Ans:Both A and R are true but R is not the correct explanation of A
24 The plant with longest normal chromosomes belongs to series




Ans:Coronariae
25 Hofmeister observed the chromosomes of




Ans:Meiotic stage
26 Arrange the following in a sequence of gradual increase in their chromosomal number
I. Primary Endosperm Nucleus of Gossypium hirsutum
II. Egg cell of Saccharum
III. Sperm cell of Nicotiana
IV. Colchicine treated Allium meristematic cell





Ans:III, IV, II, I
27 Identify the group with similar chromosome number




Ans:Triploid Allium, diploid Oryza, haploid Nicotiana
28 Karyotype does not indicate




Ans:Types of genes present in a chromosome
29 In a metaphasic chromosome the ratio between the number chromatids and chromosomal arms is 1:1. The chromosome must be




Ans:Telocentric
30 Heteropycnosis refers to




Ans:Differential staining nature of chromosome
31 Study the following table and choose the correct combination





Ans:I and IV
32 [A]: Histones are basic proteins
[R]: Core proteins of nucleosome are rich in aminoacids Argenine and Lysine





Ans:Both A and R are true and R is the correct explanation of A
33 Nucleolar organizer is




Ans:Secondary constriction I
34 The following histone is present outside the nucleosome




Ans:H1
35 The total number of chromatids seen in Metaphasic meristematic cell of Pisum is




Ans:28
36 The set/s having cell organelles with morphologically similar structures are
I. Mitochondrion – Golgi complex
II. Golgi complex – Endoplasmic reticulum
III. Endoplasmic reticulum - Mitochondrion





Ans:only II
37 Cell organelles that can give rise other cell organelles are




Ans:Endoplasmic reticulum, Golgi complex
38 Match the following





Ans:A - III, B - V, C - II, D - I
39 Study the following table and choose the correct combination





Ans:All except IV
40 [A]: Nucleus is brain of the cell
[R]: It has master molecule that has all the genes of genome





Ans:Both A and R are true and R is the correct explanation of A

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Asthra