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Consider the following statements. (A) Plant cells have centri
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Consider the following statements. (A) Plant cells have centrioles which are absent in almost all animal cells (B) Ribosomes are the site of protein synthesis (C) The middle lamella is a layer mainly of calcium carbonate which holds the different neighbouring cells together (D) In animal cell steroidal hormones are synthesized by smooth endoplasmic reticulum Of the above statements :

A
(A) and (B) only are correct

B
(C) and (D) only are correct

C
(B) and (D) only are correct

D
(A) and (D) only are correct

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Book:

Modern ABC Biology Class 11 Part 1 (Modern ABC)

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Consider the following statements. (A) Plant cells have centrioles which are absent in almost all animal cells (B) Ribosomes are the site of protein synthesis (C) The middle lamella is a layer mainly of calcium carbonate which holds the different neighbouring cells together (D) In animal cell steroidal hormones are synthesized by smooth endoplasmic reticulum Of the above statements :
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(B) and (D) only are correct
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Practice questions from Modern ABC Biology Class 11 Part 1 (Modern ABC)

Question 1
Easy
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Which one of the following cellular parts is correctly described?
  1. Thylakoids-flattened membranous sacs forming the grana of chloroplasts
  2. Centrioles-sites for active RNA synthesis
  3. Ribosomes-those of chloroplasts are larger (80S) while those of the cytoplasm are smaller (70S)
  4. Lysosomes-optimally active at a pH of about
Topic

Topic:

Cell: The Unit of Life

Book

Book:

Modern ABC Biology Class 11 Part 1 (Modern ABC)

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Question 2
Medium
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Which of the following is present both in prokaryotic and eukaryotic cells?
  1. Mitochondria
  2. Endoplasmic reticulum
  3. Ribosomes
  4. Nucleus
Topic

Topic:

Cell: The Unit of Life

Book

Book:

Modern ABC Biology Class 11 Part 1 (Modern ABC)

View 3 solutions

Question 3
Easy
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The plane of cell wall formation in a dividing cell is determined by:
  1. Golgi apparatus
  2. Microfilaments
  3. Microtubules
  4. Endoplasmic reticulum
Topic

Topic:

Cell: The Unit of Life

Book

Book:

Modern ABC Biology Class 11 Part 1 (Modern ABC)

View solution

Question 4
Easy
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Many ribosomes may associate with a single m-RNA to form multiple copies of polypeptide simultaneously. Such strings of ribosomes are termed:
  1. Polysomes
  2. Plastidomes
  3. Polyhedral bodies
  4. Nucleosomes
Topic

Topic:

Cell: The Unit of Life

Book

Book:

Modern ABC Biology Class 11 Part 1 (Modern ABC)

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Practice more questions from Cell: The Unit of Life

Question 1
Medium
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Views: 5,614

Glyoxylate cycle occurs in :
  1. Lysosomes
  2. Ribosomes
  3. Glyoxysomes
  4. Peroxisomes
Topic

Topic:

Cell: The Unit of Life

View solution

Question 2
Easy
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Views: 5,487

Mention a single membrane bound organelle which is rich in hydrolytic enzymes.
Topic

Topic:

Cell: The Unit of Life

Book

Book:

Modern ABC Biology Class 11 Part 1 (Modern ABC)

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Question 3
Easy
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Views: 5,988

Which one of the following pairs is not correctly matched
  1. Cristae The "Shelves" formed by the folding of the inner membrane of the mitochondrion
  2. Plasmodesmata The membrane surrounding the vacuole in plants
  3. Grana Membrane bound discs in chloroplasts that contain chlorophylls and carotenoids
  4. Middle lamella Layer between adjacent cell walls in plants derived from cell plate
Topic

Topic:

Cell: The Unit of Life

Book

Book:

Biology-for-NEET-Volume-1-Class-XI

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Question 4
Easy
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Define cyclosis.
Topic

Topic:

Cell: The Unit of Life

Book

Book:

Modern ABC Biology Class 11 Part 1 (Modern ABC)

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Practice questions on similar concepts asked by Filo students

Question 1
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List down the functions and ways to take care of each organ system. Organ System Functions Ways to Take Care Skeletal System Organ System Heart System Lymphatic System Ways to Take Care Respiratory System Circulatory System Urinary System Digestive System
Topic

Topic:

Biology

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Question 2
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Views: 5,542

26 (a) (a) Figure 2.6 (a) Tobacco Mosaic Virus (TMV) (b) Bacteriophage Once they infect a cell they take over the machinery of the host cell to replicate themselves, killing the host. Would you call viruses living or non-living? The name virus that means venom or poisonous fluid was given by Dmitri Ivanowsky (1892) recognised certain microbes as causal organism of the mosaic disease of tobacco (Figure 2.6a). These were found to be smaller than bacteria because they passed through bacteria-proof filters, M.W. Beljerinek (1898) demonstrated that the extract of the infected plants of tobacco could cause infection in healthy plants and called the fluid as Contagium vivum fluidum (infectious living fluid). W.M. Stanley (1935) showed that viruses could be crystallised and crystals consist largely of proteins. They are inert outside their specific host cell. Viruses are obligate parasites. In addition to proteins, viruses also contain genetic material, that could be either RNA or DNA. No virus contains both RNA and DNA. A virus is a nucleoprotein and the genetic material is infectious. In general, viruses that infect plants have single stranded RNA and viruses that infect animals have either single or double stranded RNA or double stranded DNA. Bacterial viruses or bacteriophages (viruses that infect the bacteria) are usually double stranded DNA viruses (Figure 2.6b). The protein coat called capsid made of small subunits called capsomeres, protects the nucleic acid. These capsomeres are arranged in helical or polyhedral geometric forms. Viruses cause diseases like mumps, small pox, herpes and influenza. AIDS in humans is also caused by a virus. In plants, the symptoms can be mosaic formation, leaf rolling and curling, yellowing and vein clearing, dwarfing and stunted growth.
Topic

Topic:

Diversity in the Living World

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Question 3
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You are given with a rose plant which is tall and has red flowers. Alleles for tall character (T) is dominant over short (t) and the allele for red flowers (R) is dominant over white (r). List all possible genotypes for the rose plant which is tall and has red flowers ? How do you identify the genotype of the given rose plant for the height and flower colour ?
Topic

Topic:

Biology

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Question 4
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Views: 5,732

Q.7 In most carbohydrates, the ratio of hydrogen atoms to oxygen atoms is: (a) 2:1 (b) (c) (d) None of above Q.8 Trypsin helps in the digestion of: (a) Vitamins (b) Fats (c) Protein (d) Carbohydrate Q.9 What are the main sources of Protein?
  1. Fish, meat, eggs
  2. Green vegetable
  3. Wheat and rice
  4. Sunlight and water
Topic

Topic:

Biology in Human Welfare

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Question Text
Consider the following statements. (A) Plant cells have centrioles which are absent in almost all animal cells (B) Ribosomes are the site of protein synthesis (C) The middle lamella is a layer mainly of calcium carbonate which holds the different neighbouring cells together (D) In animal cell steroidal hormones are synthesized by smooth endoplasmic reticulum Of the above statements :
TopicCell: The Unit of Life
SubjectBiology
ClassClass 11
Answer TypeText solution:1
Upvotes144