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MCQs

Total Questions : 339 | Page 28 of 34 pages
Question 271. All of the following are features of prokaryotes except
  1.    locomotion
  2.    photosynthesis
  3.    sexual reproduction
  4.    nitrogen fixation
 Discuss Question
Answer: Option C. -> sexual reproduction
Question 272. Genetic and biochemical similarities between contemporary cyanobacteria and eukaryotic chloroplasts are accepted to mean that
  1.    oxygenic photosynthesis first evolved in eukaryotes
  2.    cyanobacteria arose from chloroplasts which escaped from plant cells
  3.    eukaryotes evolved from archaea
  4.    eukaryotes evolved from bacteria
 Discuss Question
Answer: Option C. -> eukaryotes evolved from archaea
Question 273. Which of the following may account for the small size of the cells?
  1.    All of these
  2.    The surface area/volume ratio
  3.    The rate of diffusion
  4.    The number of mRNAs that can be produced by the nucleus
 Discuss Question
Answer: Option A. -> All of these
Question 274. Which of the following is/are included in Kingdom Prokaryotae?
  1.    Fungi
  2.    All of these
  3.    Bacteria
  4.    Protozoa
 Discuss Question
Answer: Option C. -> Bacteria
Question 275. Which of the following structures is the smallest?
  1.    Hydrogen atom
  2.    Viriod
  3.    Bacterium
  4.    Mitochondrion
 Discuss Question
Answer: Option A. -> Hydrogen atom
Question 276. Which of the following best represents the hierarchy of levels of biological classification?
  1.    Kingdom, phylum, class, order, family, genus, species
  2.    Phylum, kingdom, class, order, genus, species, family
  3.    Class, order, kingdom, phylum, family, genus, species
  4.    Kingdom, phylum, family, class, order, genus, species
 Discuss Question
Answer: Option A. -> Kingdom, phylum, class, order, family, genus, species
Question 277. The three domain version of life on earth is based on the
  1.    characteristics of the cell wall
  2.    morphological traits
  3.    nucleic acid sequence data
  4.    metabolic traits
 Discuss Question
Answer: Option C. -> nucleic acid sequence data
Question 278. Most microbial structures and enzymes are composed of
  1.    carbohydrates
  2.    lipids
  3.    proteins
  4.    lipids and carbohydrates
 Discuss Question
Answer: Option C. -> proteins
Question 279. The individual best remembered for bringing microbes to the world is
  1.    Robert Hooke
  2.    Antony Van Leeuenhoek
  3.    Masaki Ogata
  4.    Robert Koch
 Discuss Question
Answer: Option B. -> Antony Van Leeuenhoek
Question 280. Micro organisms are found in which of the following kingdom of five kingdom concept (Whittaker's classification)?
  1.    All of these
  2.    Protista
  3.    Monera
  4.    Fungi
 Discuss Question
Answer: Option A. -> All of these

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