a) Schwann
b) Robert Hooke
c) de Bary
d) Tatum
2. Cell theory was proposed by
a) Beadle and Tatum
b) Robert Hooke
c) Schleiden and Schwann
d) Leenuwenhoeck
3. The cell theory is not
applicable to
a) Bacteria
b) algae
c) Virus
d) fungi
4. Semiautonomous organelle in
the cell is
a) Peroxisomes
b) Chloroplast
c) Endoplasmic reticulam
d) Golgibodies
a) cytoplast
b) tonoplast
c) amyloplast
d) elaioplast
6. Identify the non
-membraneous organelle from the following
a) Ribosome
b) Endoplasmic reticulam
c) Nucleus
d) Chloroplast
a) actin
b)tubulin
c) myosin
d) chitin
8. Experiments demonstrating the
importance of the nucleus in controlling the growth of the cell was performed in
a) Starfish
b) Acetabularia
c) Neurospora
d) Leucocytes
a) Cristae
b) Cisternae
c) Annuli
d) Quatasomes
a) 60 S+40 S
b) 70 S+30 S
c) 60 S+30 S
d) 50 S+30 S
a) cellulose
b) starch
c) protein
d) lipid
a) protein synthesis
b) carbohydrate synthesis
c) amino acid synthesis
d) Lipid synthesis
a) Discoid
b) cup shaped
c) girdle shaped
d) ribbon shaped
14. The main function of Centrosome
is
a) Secretion
b) osmoregulation
c) Protein synthesis
d) Formation of spindle fibre
15. Assembly of two subunits 40 S
and 60 S of the ribosome is
a) 100 S unit
b) 80 S unit
c) 70 S unit
d) 90 S unit
Answers:
|
1- b
|
2- c
|
3-c
|
4-b
|
5-b
|
|
6-a
|
7-a
|
8-b
|
9-b
|
10-d
|
|
11-a
|
12-d
|
13-a
|
14-d
|
15-b
|
Nucleus
Multiple Choice Questions on Nucleus
1.
Nuclei were first discovered by
a) Strasburger
b) Fonatana
c) Robert Brown
d) Robert Koch
b) Fonatana
c) Robert Brown
d) Robert Koch
3. The Grafting experiment of Hammerling established the role of nucleus in heredity. The experimental material was
a) Chlorella
b) Acetabularia
c) Chara
d) Scendesmus
4. Nucleus are absent in
a) Red blood cells and bacterium
b) Red blood cells, sieve cells and bacterium
c) Red blood cells only
d) none of these
5. Which of the following statements is true regarding the size of nucleus?
a) The size of the nucleus is directly proportional to that of the cytoplasm
b) The size of the nucleus depends on the total cell volume
c) The size of the nucleus depends on the chromosome number or ploidy level of the cell
d) all of these
6. Nucleus has
a) DNA only
b) DNA and protein only
c) DNA, RNA and proteins
d) none of these
7. Nuclear membrane is in continuous connection with
a) SER
b) RER
c) Golgi apparatus
d) lysosomes
8. The protein network that lines the inner side of nuclear membrane is called
a) Nucleolus
b) nuclear matrix
c) nuclear lamina
d) nuclear proteins
9. The number of nuclear pores depends on the
a) size of the cell
b) transcriptional activity of the cell
c) DNA content of the cell
d) all of these
10. The most important function of nuclear envelope is to
a) regulate nucleo cytoplasmic traffic
b) protect genetic material
c) prevent the entrance of active ribosomes into the nucleus
d) synthesis rRNAs
11. The DNA protein ratio in chromatin is
a) 3:1
b) 2:1
c) 1:1
d) 4:1
12. Nucleolus is a prominent acidophilic spherical bodies in the nucleus. The function is
a) RNA synthesis
b) DNA synthesis
c) histone synthesis
d) ribosomal subunit synthesis
13. The basic proteins of the nucleus are
a) nucleohistones
b) nucleoprotamines
c) both a and b
d) none of these
14. The major amino acids in histones are
a) Gluatamate and aspartic acid
b) lysine and arginine
c) arginine, lysine and histidine
d) histidine
15. The light stained and diffused region of chromatin is known as
a) Heterochromatin
b) Euchromatin
c) chromatin
d) none of these
Answers
1. c) Robert Brown
2. a) nucleus
3. b) Acetabularia
4. b) Red blood cells, sieve cells and bacterium
5. d) all of these
6. c) DNA, RNA and proteins
7. b) RER
8. c) nuclear lamina
9. b) transcriptional activity of the cell
10. c) prevent the entrance of active ribosomes into the nucleus
11. c) 1:1
12. d) ribosomal subunit synthesis
13. c) both a and b
14. c) arginine, lysine and histidine
15. b) Euchromatin
1. c) Robert Brown
2. a) nucleus
3. b) Acetabularia
4. b) Red blood cells, sieve cells and bacterium
5. d) all of these
6. c) DNA, RNA and proteins
7. b) RER
8. c) nuclear lamina
9. b) transcriptional activity of the cell
10. c) prevent the entrance of active ribosomes into the nucleus
11. c) 1:1
12. d) ribosomal subunit synthesis
13. c) both a and b
14. c) arginine, lysine and histidine
15. b) Euchromatin
Ribosomes
Multiple Choice Questions on Ribosomes
1.
All the following sites has ribosomes except
a)
nucleus
b) mitochondrion
c) chloroplast
d) cytoplasm
2. Ribosomes are present in
a) Eukaryotes only
b) Eukaryotes and prokaryotes
c) Prokaryotes only
d) Eukaryotes, prokaryotes and viruses
3. In 70S ribosomes, ‘S’ stands for
a) SI unit
b) Solubility factor
c) Svedberg unit
d) all of these
4. 80 S ribosomes occur in
a) Eukaryotic cells of animals
b) Eukaryotic cells of animals and plants
c) Both Eukaryotic cells and prokaryotic cells
d) all of these
5. The subunits of 80S ribosome include
b) mitochondrion
c) chloroplast
d) cytoplasm
2. Ribosomes are present in
a) Eukaryotes only
b) Eukaryotes and prokaryotes
c) Prokaryotes only
d) Eukaryotes, prokaryotes and viruses
3. In 70S ribosomes, ‘S’ stands for
a) SI unit
b) Solubility factor
c) Svedberg unit
d) all of these
4. 80 S ribosomes occur in
a) Eukaryotic cells of animals
b) Eukaryotic cells of animals and plants
c) Both Eukaryotic cells and prokaryotic cells
d) all of these
5. The subunits of 80S ribosome include
a) 40S and 50S
b) 30S and 50S
c) 40S and 60S
d) 20S and 60S
6. Which of the following ions are required for binding of ribosomal subunits
a) Na+
b) Mg++
c) Mn++
d) Fe++
7. 70S ribosome occur in
a) viruses
b) prokaryotes
c) prokaryotes and eukaryotic plant cells
d) All of these
8. The larger and smaller subunit of 70S ribosome is
a) 50S and 30S
b) 30S and 40S
c) 40S and 20S
d) 20S and 50S
9. Ribosomes are made up of
a) RNA only
b) RNA and proteins
c) RNA, DNA and proteins
d) Nucleic acids, proteins and lipids
10. Polysomes are
a) multiple units of ribosomes
b) attachment of many ribosomes to a common mRNA
c) attachment of many mRNA to a common ribosomes
d) lysosomal aggregations
11. The rRNA subunits of 70S ribosome are
a) 23S in larger 50S ribosomal subunit and 16S and 5S rRNA in smaller 30S ribosomal subunit
b) 23S and 5S in larger 50S ribosomal subunit and 16S rRNA and 5S in smaller 30S ribosomal subunit
c) 28S and 5S in larger 50S ribosomal subunit and 16S rRNA in smaller 30S ribosomal subunit
d)23S and 5S in larger 50S ribosomal subunit and 16S rRNA in smaller 30S ribosomal subunit
12. Chloramphenicol inhibits
a) bacterial ribosomes
b) plant ribosomes
c) both a and b
d) animal ribosomes
13. Which of the following organelle lack ribosomes
a) mitochondrion
b) nucleus
c) chloroplast
d) RER
14. Protein synthesis by eukaryotic ribosomes is inhibited by
a) Chloramphenicol
b) cycloheximide
c) Penicillin
d) Cinchonine
15. Which of the following statements are true
a) Ribosomes are self-replicating organelles
b) Ribosomes are double membrane bound organelles
c) Ribosomal components are coded by DNA
d) Ribosomes are deoxyribonucleoproteins
Answers:
1. a) nucleus
2. b) Eukaryotes and prokaryotes
3. c) Svedberg unit
4. b) Eukaryotic cells of animals and plants
5. c) 40S and 60S
6. b) Mg++
7. b) prokaryotes
8. a) 50S and 30S
9. b) RNA and proteins
10. b) attachment of many ribosomes to a common mRNA
11. d) 23S and 5S in larger 50S ribosomal subunit and 16S rRNA in smaller 30S ribosomal subunit
12. a) bacterial ribosomes
13. b) nucleus
14. b) cycloheximide
15. c) Ribosomal components are coded by DNA
1. a) nucleus
2. b) Eukaryotes and prokaryotes
3. c) Svedberg unit
4. b) Eukaryotic cells of animals and plants
5. c) 40S and 60S
6. b) Mg++
7. b) prokaryotes
8. a) 50S and 30S
9. b) RNA and proteins
10. b) attachment of many ribosomes to a common mRNA
11. d) 23S and 5S in larger 50S ribosomal subunit and 16S rRNA in smaller 30S ribosomal subunit
12. a) bacterial ribosomes
13. b) nucleus
14. b) cycloheximide
15. c) Ribosomal components are coded by DNA
