Site of Protein synthesis in cell is — a. Mitochonderia b. Ribosomes c. Cell wall d. Chloroplast

Site of Protein synthesis in cell is —
a. Mitochonderia
b. Ribosomes
c. Cell wall
d. Chloroplast
by

1 Answer

Answer :

b. Ribosomes
by

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The structure within a cell that distinguishes the cell as being eukaryotic, and prokaryotic is (A) Ribosomes (B) Cell membrane (C) Cell wall (D) Nucleus

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Which of the following organelles are called the Protein Factories of the cell? (1) Chloroplasts (2) Lysosomes (3) Mitochondria (4) Ribosomes

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The part of the cell which binds to the mRNA during protein systhesis is C A. Golgi bodies B. Lysosomes C. Ribosomes D. Food vacuoles

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De novo synthesis of pyrimidine nucleotides occurs in (A) Mitochondria (B) Cytosol (C) Microsomes (D) Ribosomes

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De novo synthesis of purine nucleotide occurs in (A) Mitochondria (B) Cytosol (C) Microsmes (D) Ribosomes

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During synthesis of porphyrins, synthesis of δ-amino levulinic acid occurs in (A) Mitochondria (B) Cytosol (C) Both in mitochondria and cytosol (D) Ribosomes

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Which one of the following cellular parts is correctly described? (a) Thylakoids - flattened membranous sacs forming the grana of chloroplasts (b) Centrioles - sites for active RNA synthesis (c) Ribosomes - those on chloroplasts are larger (80S) while those in the cytoplasm are smaller (70S) (d) Lysosomes - optimally active at a pH of about 8.5

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Last Answer : (a) Thylakoids - flattened membranous sacs forming the grana of chloroplasts

Mitochondria and chloroplast are (A) semi-autonomous organelles (B) formed by division of pre-existing organelles and they contain DNA but lack protein synthesising machinery. Which one of the following options is correct? (a) (A) is true but (B) is false. (b) Both (A) and (B) are false. (c) Both (A) and (B) are correct. (d) (B) is true but (A) is false.

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The colourless plastid which stores starch and protein is ________. a) chloroplast b)leucoplast c)chromoplast d)none

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Genetic information of nuclear DNA is transmitted to the site of protein synthesis by (A) rRNA (B) mRNA (C) tRNA (D) Polysomes

Description : Genetic information of nuclear DNA is transmitted to the site of protein synthesis by (A) rRNA (B) mRNA (C) tRNA (D) Polysomes

Last Answer : D

The main site of protein synthesis

Description : The main site of protein synthesis

Last Answer : Ans. Ribosome

Select the antibiotic which inhibits bacterial protein synthesis by interfering with translocation of elongating peptide chain from acceptor site back to the peptidyl site of the ribosome so that ribosome does not move along the mRNA and the peptide chain is prematurely terminated: A. Chloramphenicol B. Erythromycin C. Tetracycline D. Streptomycin

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Last Answer : B. Erythromycin

.Viruses possess (a) ribosomes to synthesize protein ((c) either DNA or RNA (d) none of these.b) organelle for its vital mechanism

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Last Answer : (c) either DNA or RNA

Thermococcus, Methanococcus and Methano- bacterium exemplify (a) bacteria whose DNA is relaxed or positively supercoiled but which have a cytoskeleton as well as mitochondria (b) bacteria that contain a cytoskeleton and ribosomes (c) archaebacteria that contain protein homologous to eukaryotic core histones (d) archaebacteria that lack any histones resembling those found in eukaryotes but whose DNA is negatively supercoiled

Description : Thermococcus, Methanococcus and Methano- bacterium exemplify (a) bacteria whose DNA is relaxed or positively supercoiled but which have a cytoskeleton as well as mitochondria (b) bacteria that ... that lack any histones resembling those found in eukaryotes but whose DNA is negatively supercoiled

Last Answer : (c) archaebacteria that contain protein homologous to eukaryotic core histones

A quorum sensing system A- .detects a signal from the external environment B- B.senses a compound produced by the bacterium itself C- consists of a sensor component that phosphorylates a regulatory protein D- .controls the activity of ribosomes directly

Description : A quorum sensing system A- .detects a signal from the external environment B- B.senses a compound produced by the bacterium itself C- consists of a sensor component that phosphorylates a regulatory protein D- .controls the activity of ribosomes directly

Last Answer : B.senses a compound produced by the bacterium itself