Page 1 of 1: MCQ "1"

wasem · Credits: 8592 My Scrapbook

Question 1. CELL MEMBRANE

(a) is structurally based on a lipid bilayer
True False

(b) contains proteins which only act as enzymes
True False

(c) surrounds the nucleus in a single layer
True False

(d) surrounds individual ribosomeswithin the cell
True False

(e) is maintained by vesicles derived from the Golgi
True False

Question 2. LYSOSOMES

(a) lysosomes have a membrane H+-ATPase capable of maintaining an acid environment
True False

(b) the enzymes contained in lysosomes are also present in peroxisomes
True False

(c) vesicles from the Golgi take acid hydrolases to lysosomes
True False

(d) fusion of an endosome with a vesicle containing acid hydrolases forms an endolysosome
True False

(e) lysosomal storage diseases are caused by lack of specific lysosomal enzymes leading to accumulation of a metabolic product
True False

Question 3. IN DIVIDING CELLS

(a) the nuclear membrane is fragmented during separation of chromosomes
True False

(b) the nucleolus is involved in ribosomal biogenesis and is a prominent structure in dividing cells
True False

(c) prophase and metaphase both occur in the S phase of the cell cycle
True False

(d) the final daughter cells which derive from meiosis are haploid
True False

(e) control of the overall population may be regulated by apoptosis
True False

Question 4. THERE ARE SEVERAL DISTINCT FEATURES OF EPITHELIAL CELLS:

(a) squamous epithelial cells are flat and plate-like
True False

(b) a pseudostratified epithelium has all its cells in contact with the underlying extracellular matrix
True False

(c) a simple columnar cell is typically 2-3 times higher than its width
True False

(d) cell division occurs at all layers in a stratified squamous epithelium
True False

(e) transitional epithelium is a characteristic cell lining the urinary tract
True False

Question 5. IN EPITHELIAL CELLS:

(a) microvilli are braced by the actin cytoskeleton
True False

(b) membrane plaques are a feature of transitional epithelium
True False

(c) cilia are based on the intermediate filaments
True False

(d) the glycocalyx is seen within the rough ER and stores lipids
True False

(e) the characteristic type of intermediate filament is cytokeratin
True False

Question 6. COLLAGEN

(a) type I is the main collagen in skin
True False

(b) type IV is the main type in bone
True False

(c) type III is the main type in reticulin
True False

(d) is secreted by fibroblasts as procollagen molecules.
True False

(e) is one of the matrix components of osteoid.
True False

Question 7. BASEMENT MEMBRANE

(a) contains type I collagen
True False

(b) contains laminin
True False

(c) contains glycosaminoglycans
True False

(d) links to epithelial cells via integrin receptors
True False

(e) acts as a permeability barrier.
True False

Question 8. SKELETAL MUSCLE CELLS

(a) have thin filaments made of actin which are anchored to the Z band
True False

(b) have thick filaments made of desmin which are anchored to the M band
True False

(c) regulate contraction by control of calcium release from sarcoplasmic reticulum
True False

(d) are surrounded by an external lamina
True False

(e) contain multiple nuclei in each cell
True False

raghavmehan · Credits: 312 My Scrapbook My Reading List 1 Books

good ones

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