Which of the following is not true about plasmid

(A) extra chromosomal DNA

(B)give unique genotypic characters to bacteria

(C)helps in antibiotic resistance

(D)helps in reproduction

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The common organelle present in both eukaryotes and prokaryotes is

(A)Vacuole

(B)cell membrane

(C)ribosome

(D)centrosome

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Which of the following is the characteristic of  prokaryotes

(A)mesosome

(B)naked DNA

(C)plasmid

(D)All of the above

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Arrange the following in the increasing of their size

(A)virus< PPLO< typical bacteria< typical eukaryotic cell

(B) PPLO< virus< typical bacteria< typical eukaryotic cell

(C) virus< PPLO< typical eukaryotic cell< typical bacteria

(D) virus> PPLO> typical bacteria> typical eukaryotic cell

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The detailed structure of the cell membrane was studied only after the advent of the

(A)compound microscope

(B)cryo-electron microscopy

(C)X-ray crystallography

(D)electron microscope

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The lipid component of the membrane mainly consists of

(A)phosphoglycerides

(B)triglycerides

(C)monoglycerides

(D)Both B and C

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In membranes, the lipids are arranged within the membrane with the ______heads towards the outer sides and the _________ tails towards the inner part.

(A)polar, charged

(B)polar, hydrophobic

(C)polar, nonpolar

(D)Both B and C

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Which of the following biomolecules is not the part of membrane?

(A)Nucleic Acid

(B)Proteins

(C)Lipids

(D)Carbohydrates

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Which one is true for the cell membrane

(A)The ratio of lipids and proteins is fixed in membranes

(B)The amount of carbohydrates is greater than other biomolecules

(C)In human erythrocytes amount of protein is more than that of lipids

(D)All of the above

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Integral or Peripheral proteins classification is based on

(A)protein size

(B)ease of extraction

(C)ease of function

(D)ease of study

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