Ribosomes MCQs | Ribosomes Multiple Choice Questions and Answers

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Questions
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

Answer: RNA and protein
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3 Where the rRNA are formd?
A In cytoplasm
B In mitochondria
C In Cell wall
D In nucleus

Answer: In nucleus
4 Name the antibiotic which inhibits protein synthesis in eukaryotes?
A Cycloheximide
B Chlorophenicol
C Penicillin
D Cinhonine

Answer: Cycloheximide
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

Answer: Gated 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

Answer: 55S
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

Answer: Nucleus
14 Protein Synthesis By Eukaryotic Ribosomes Is Inhibited By
A Cycloheximide
B Cinchonine
C Chloramphenicol
D None of these

Answer: Cycloheximide
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

Answer: 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

Answer: 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

Answer: 5.8S 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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