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Free download in PDF Ribosomes Multiple Choice Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
(1)
Which is expressed by S unit?
[A]
Sub-unit coefficient
[B]
Statistical coefficient
[C]
Standard coefficient
[D]
Sedimentation coefficient
Answer: Sedimentation coefficient
(2)
Ribosome are made up of: -
[A]
RNA and protein
[B]
Protein and lipid
[C]
DNA and protein
[D]
DNA and RNA
(3)
Where the rRNA are formd?
[A]
In cytoplasm
[B]
In mitochondria
[C]
In Cell wall
[D]
In nucleus
(4)
Name the antibiotic which inhibits protein synthesis in eukaryotes?
[A]
Cycloheximide
[B]
Chlorophenicol
[C]
Penicillin
[D]
Cinhonine
(5)
Name the site where secreted protein synthesized?
[A]
Chloroplast ribosome
[B]
Mitochondrial ribosome
[C]
Membrane free ribosome
[D]
ER membrane bound ribosomes
Answer: ER membrane bound ribosomes
(6)
Which of the following statement is defines polysomes?
[A]
Attachment of many ribosomes to common mRNA
[B]
Lysosomal aggregation
[C]
Attachment of many mRNA to ribosomes
[D]
Multiple units of ribosomes
Answer: Attachment of many ribosomes to common mRNA
(7)
Which of the following transport involves translocation of the protein from cytosol to the nucleus?
[A]
Gated transport
[B]
Non-gated transport
[C]
Transmembrane transport
[D]
Vesicular transport
(8)
Which of the following Scientist discovered ribosome for the first time?
[A]
Antonie van Leeuwenhoek
[B]
Theodor Schwann
[C]
George Emil Palade
[D]
None of these
Answer: George Emil Palade
(9)
Which of the following is not a sorting signal present of protein?
[A]
Amino acid sequence
[B]
Carbohydrate sequence
[C]
Signal patch
[D]
Signal peptide
Answer: Carbohydrate sequence
(10)
What is the sedimentation coefficient of mitochondrial ribosome of humans?
[A]
55S
[B]
80S
[C]
70S
[D]
None of these
(11)
Which of the following statements are true
[A]
Ribosomes are double membrane bound organelles
[B]
Ribosomal components are coded by DNA
[C]
Ribosomes are deoxyribonucleoproteins
[D]
Ribosomes are self-replicating organelles
Answer: Ribosomal components are coded by DNA
(12)
The rRNA subunits of 70S ribosome are
[A]
23S and 5S in larger 50S ribosomal subunit and 16S rRNA in smaller 30S ribosomal subunit
[B]
28S and 5S in larger 50S ribosomal subunit and 16S rRNA in smaller 30S ribosomal subunit
[C]
23S in larger 50S ribosomal subunit and 16S and 5S rRNA in smaller 30S ribosomal subunit
[D]
23S and 5S in larger 50S ribosomal subunit and 16S rRNA and 5S in smaller 30S ribosomal subunit
Answer: 23S and 5S in larger 50S ribosomal subunit and 16S rRNA in smaller 30S ribosomal subunit
(13)
Which of the following organelle lack ribosomes
[A]
Nucleus
[B]
Chloroplast
[C]
Mitochondrion
[D]
RER
(14)
Protein Synthesis By Eukaryotic Ribosomes Is Inhibited By
[A]
Cycloheximide
[B]
Cinchonine
[C]
Chloramphenicol
[D]
None of these
(15)
Chloramphenicol inhibits
[A]
Animal Ribosomes
[B]
Plant Ribosomes
[C]
Both A And B
[D]
Bacterial Ribosomes
Answer: Bacterial Ribosomes
(16)
Ribosomes are made up of
[A]
RNA, DNA and proteins
[B]
Nucleic acids, proteins and lipids
[C]
RNA only
[D]
RNA and proteins
(17)
Polysomes are
[A]
Attachment Of Many Ribosomes To A Common Mrna
[B]
Lysosomal Aggregations
[C]
Multiple Units Of Ribosomes
[D]
Attachment Of Many Mrna To A Common Ribosomes
Answer: Attachment Of Many Ribosomes To A Common Mrna
(18)
Genetic information stored in mRNA is translated to polypeptide by ___________
[A]
Nucleus
[B]
Golgi apparatus
[C]
Endoplasmic reticulum
[D]
Ribosome
(19)
Which of the following ribosomal RNA does not take part in rDNA organization of E.coli?
[A]
5.8S RNA
[B]
16S RNA
[C]
5S RNA
[D]
23S RNA
(20)
In where the monosomes are found?
[A]
In prokaryotic cells
[B]
In eukaryotic cells
[C]
In mitochondria
[D]
In RNA
Answer: In prokaryotic cells
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