Question : Which is correct about cell theory in view of current status of our knowledge about cell structure?
a) It needs modification due to discovery of subcellular structures like chloroplasts and mitochondria
b) Modified cell theory means that all living beings are composed of cells capable of reproducing
c) Cell theory does not hold good because all living beings do not have cellular organisation (eg, viruses)
d) Cell theory means that all living objects consist of cells whether or not capable of reproducing
Question : In plant cells, peroxisomes are associated with
a) photorespiration
b) phototropism
c) photoperiodism
d) photosynthesis
Question : Name of Schleiden and Schwann are associated with
a) protoplasm as the physical basis of life
b) cell theory
c) theory of cell lineage
d) nucleus functions as control centre of cell
Question : Membranous bag with hydrolytic enzymes which is used for controlling intracellular digestion of macromolecules is
a) endoplasmic reticulum
b) nucleosome
c) lysosome
d) phagosome
Question : Golgi apparatus is absent in
a) higher plants
b) yeast
c) bacteria and blue-green algae
d) None of the above
Question : Inner membrane convolutions of a mitochondrion are known as
a) lamellae
b) thylakoids
c) grana
d) cristae
Question : Cell organelles having hydrolases/digestive enzymes are
a) peroxisomes
b) lysosomes
c) ribosomes
d) mesosomes
Question : Organelle/organoid involved in genetic engineering is
a) plasmid
b) mitochondrion
c) Golgi apparatus
d) lomasome
Question : Mitochondrial cristae are sites of
a) breakdown of macromolecules
b) protein synthesis
c) phosphorylation of flavoproteins
d) oxidation-reduction reactions
Question : Organelle having flattened membrane bound cisternae and lying near the nucleus is
a) Golgi apparatus
b) mitochondrion
c) centriole
d) nucleolus
Question : Series of reactions which can convert fatty acids to sugars in plants but not in animals is
a) Krebs cycle
b) glyoxylate cycle
c) Ornithine cycle
d) glycolysis
Question : The prokaryotic flagella possess
a) unit membrane enclosed fibre
b) protein membrane enclosed fibre
c) ‘9+2’ membrane enclosed structure
d) helically arranged protein molecule
Question : The desmosomes are concerned with
a) cytolysis
b) cell division
c) cell adherence
d) cellular excretion
Question : The function of rough endoplasmic reticulum is
a) fat synthesis
b) lipid synthesis
c) protein synthesis
d) steroid synthesis
Question : Lysosomes have a high content of
a) hydrolytic enzymes
b) lipoproteins
c) polyribosomes
d) DNAligases
Question : Protein synthesis in an animal cell takes place
a) only in cytoplasm
b) in the nucleolus as well as in the cytoplasm
c) in the cytoplasm as well as in mitochondria
d) only on ribosomes attached to nucleus
Question : The mechanism of ATP formation both in chloroplast and mitochondria is explained by
a) Relay pump theory of Godlewski
b) Cholodny-Went’s model
c) Chemiosmotic theory
d) Munch’s mass flow hypothesis
Question : The proteins are synthesized at
a) ribosomes
b) mitochondria
c) centrosomes
d) Golgi bodies
Question : Microtubule is involved in the
a) cell division
b) membrane architecture
c) muscle contraction
d) DNA recognition
Question : Some of the enzymes which are associated in converting fats into carbohydrates, are present in
a) liposomes
b) Golgi bodies
c) microsomes
d) glyoxysomes
Question : Photosynthetic bacteria have pigments in
a) chromoplasts
b) leucoplasts
c) chloroplasts
d) chromatophore
Question : Which of the following organ has single membrane?
a) Nucleus
b) Cell wall
c) Mitochondria
d) Spherosomes
Question : Lysosomes are reservoirs of
a) RNA and protein
b) fats
c) secretory glycoproteins
d) hydrolytic enzymes
Question : In an animal cell, protein synthesis takes place
a) only on the ribosomes present in cytosol
b) only on ribosomes attached to nuclear envelope and ER
c) on ribosomes present in the nucleolus as well as in cytoplasm
d) on ribosomes present in the cytosol as well as in the mitochondria
Question : The cell organelle involved in glycosylation of protein is
a) ribosome
b) peroxisome
c) endoplasmic reticulum
d) mitochondria
Question : Microtubules absent in
a) mitochondria
b) centriole
c) flagella
d) spindle fibres
Question : In fluid mosaic model of plasma membrane
a) upper layer is non-polar and hydrophilic
b) upper layer is polar and hydrophobic
c) phospholipids form a bimolecular layer in middle part
d) proteins form a middle layer
Question : In which one of the following is nitrogen not a constituent?
a) Pepsin
b) Idioblast
c) Bacteriochlorophyll
d) Invertase
Question : Flagella of prokaryotic and eukaryotic cells differ in
a) type of movement and placement in cell
b) location in cell and mode of functioning
c) microtubular organization and type of movement
d) microtubular organization and function
Question : Extra nuclear inheritance is a consequence of presence of genes in
a) mitochondria and chloroplasts
b) endoplasmic reticulum and mitochondria
c) ribosomes and chloroplast
d) lysosomes and ribosomes
Question : In chloroplasts, chlorophyll is present in the
a) outer membrane
b) inner membrane
c) thylakoids
d) stroma
Question : The main organelle involved in modification and routing of newly synthesized proteins to their destinations is
a) chloroplast
b) mitochondria
c) lysosome
d) endoplasmic reticulum
Question : Genes for cytoplasmic male sterility in plants are generally located in
a) mitochondrial genome
b) cytosol
c) chloroplast genome
d) nuclear genome
Question : Chlorophyll in chloroplast is located in
a) grana
b) pyrenoid
c) stroma
d) Both a) and c)
Question : Protein synthesis in an animal cell occurs
a) only on the ribosomes present in cytosol
b) only on ribosomes attached to the nuclear envelope and endoplasmic reticulum
c) on ribosomes present in the nucleolus as well as in cytoplasm
d) on ribosomes present in cytoplasm as well as in mitochondria
Question : According to widely accepted “fluid mosaic model” cell membranes are semi-fluid, where lipids and integral proteins can diffuse randomly. In recent years, this model has been modified in several respects. In this regard,
which of the following statements is incorrect?
a) Proteins in cell membranes can travel within the lipid bilayer
b) Proteins can also undergo flip-flop movements in the lipid bilayer
c) Proteins can remain confined within certain domains of the membrane
d) Many proteins remain completely embedded within the lipid bilayer
Question : Which of the following statements regarding mitochondrial membrane is not correct?
a) The enzymes of the electron transfer chain are embedded in the outer membrane
b) The inner membrane is highly convoluted forming a series of infoldings
c) The outer membrane resembles a sieve
d) The outer membrane is permeable to all kinds of molecules
Question : During photorespiration, the oxygen consuming reaction occurs in
a) stroma of chloroplasts and mitochondria
b) stroma of chloroplasts and peroxisomes
c) grana of chloroplasts and peroxisomes
d) stroma of chloroplasts
Question : Select the wrong statement from the following
a) both chloroplasts and mitochondria contain an inner and an outer membrane
b) both chloroplasts and mitochondria have an internal compartment, the thylakoid space bounded by the thylakoid membrane
c) both chloroplasts and mitochondria contain DNA
d) the chloroplasts are generally much larger than mitochondria
