Cell structure: CSIR NET ICMR GATE study materials

1). What type of microscope would you need to view a cellular structure that is 5 nm in size?
a). a light microscope
b). an electron microscope
c). a compound microscope
d). no microscope can resolve down to 5 nm
Answer: b

2). Which of the following is not found in prokaryotic cells?
a). ribosomes
b). cell wall
c). nucleus
d). photosynthetic membranes
Answer: c

3). Which of the following statements is incorrect.
a). DNA in the nucleus is usually coiled into chromosomes.
b). The nucleolus is the site of ribosomal RNA synthesis.
c). Some substances can pass into and out of the nucleus.
d). Red blood cells can not synthesize RNA.
Answer: a

4). Which of the following matches are not correct.
a). ribosomes — rough ER
b). protein synthesis — smooth ER
c). rough ER — export of proteins out of cell
d). smooth ER — cells in intestine
Answer: b

5). Which is the following is not produced by the Golgi apparatus?
a). glycolipids
b). glycoproteins
c). liposomes
d). secretory vesicles
Answer: c

6). What is the difference between a primary lysosome and a secondary lysosome?
a). Primary lysosomes are larger than secondary lysosomes.
b). Primary lysosomes are active, while secondary lysosomes are inactive.
c). Primary lysosomes have a low pH while, secondary lysosomes have a high pH.
d). Primary lysosomes have low levels of protons, while secondary lysosomes have high levels of protons.
Answer: d

7). Proteins that stay within the cell are produced
a). on free ribosomes in the cytoplasm.
b). in the nucleolus.
c). on ribosomes attached to rough ER.
d). on ribosomes and pass through the Golgi apparatus.
Answer: a

8). What do chloroplasts and mitochondria have in common?
a). Both are all present in animal cells.
b). Both contain their own genetic material.
c). Both are present in all eukaryotic cells.
d). Neither is present in plant cells.
Answer: b

9). Which of the following pairs is correctly matched?
a). actin–MTOC
b). intermediate fibers–protofilaments
c). microtubules–”+” / “-” ends
d). intermediate fibers –cellular movement
Answer: c

10). Which of the following eukaryotic organelles are believed to have evolved through endosymbiosis?
a). nucleus and mitochondrion
b). mitochondrion and chloroplast
c). nucleus and endoplasmic reticulum
d). chloroplast and endoplasmic reticulum
Answer: b