MCQOPTIONS
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MCQOPTIONS
This section includes 349 Mcqs, each offering curated multiple-choice questions to sharpen your Lisp knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
The part of tRNA that interacts with the codon of mRNA is termed as __________ |
| A. | Anticodon |
| B. | T-arm |
| C. | D-arm |
| D. | V-arm |
| Answer» B. T-arm | |
| 102. |
Which of following is an example of chemical mutagen? |
| A. | X rays |
| B. | Ultraviolet (UV) rays |
| C. | amino acid analog |
| D. | nucleotide analog |
| Answer» E. | |
| 103. |
Different types of tissues organize into which of following? |
| A. | cells |
| B. | muscles |
| C. | systems |
| D. | organs |
| Answer» E. | |
| 104. |
When was massive study of entire human genome completed? |
| A. | 2011 |
| B. | 2005 |
| C. | 2012 |
| D. | 2009 |
| Answer» D. 2009 | |
| 105. |
The translocated part of Philadelphia chromosome is found on chromosome ________ |
| A. | 4 |
| B. | 9 |
| C. | 11 |
| D. | 13 |
| Answer» C. 11 | |
| 106. |
In bacteria, binding of _________ factor to the RNA polymerase increases its affinity for promoter sites in the DNA. |
| A. | alpha |
| B. | sigma |
| C. | rho |
| D. | beta |
| Answer» C. rho | |
| 107. |
The “wobble hypothesis” was proposed by ______________________ |
| A. | James Watson |
| B. | Barbara McClintock |
| C. | Thomas Morgan |
| D. | Francis Crick |
| Answer» E. | |
| 108. |
Transfer RNAs decode the information present in __________________ |
| A. | mRNA |
| B. | siRNA |
| C. | miRNA |
| D. | rRNA |
| Answer» B. siRNA | |
| 109. |
Operon is switched off by a protein called |
| A. | operator |
| B. | terminator |
| C. | repressor |
| D. | stopper |
| Answer» D. stopper | |
| 110. |
Attachment of which of following to protein, makes it move to endoplasmic reticulum? |
| A. | translation complex |
| B. | signal peptide |
| C. | transport peptide |
| D. | chaperone |
| Answer» C. transport peptide | |
| 111. |
Colorectal cancer caused how many deaths per year in United States alone? |
| A. | 50000 |
| B. | 5000 |
| C. | 10000 |
| D. | 100000 |
| Answer» B. 5000 | |
| 112. |
What is blocking of gene expression by siRNAs called? |
| A. | gene regulation |
| B. | RNA interference |
| C. | RNA control |
| D. | rRNA regulation |
| Answer» C. RNA control | |
| 113. |
How many amino acids are present in one codon? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 114. |
C terminus of polypeptide chain contains which of following? |
| A. | start amino acid |
| B. | end amino acid |
| C. | tRNA tail |
| D. | mRNA tail |
| Answer» C. tRNA tail | |
| 115. |
Which of following may alter reading frame of genetic message? |
| A. | substitution |
| B. | non sense mutation |
| C. | addition |
| D. | point mutation |
| Answer» D. point mutation | |
| 116. |
Which of following processed defines cutting of parts of new mRNA? |
| A. | editing |
| B. | splicing |
| C. | cutting |
| D. | capping |
| Answer» C. cutting | |
| 117. |
Which of the following has the smallest half life? |
| A. | hnRNA |
| B. | mRNA |
| C. | tRNA |
| D. | siRNA |
| Answer» B. mRNA | |
| 118. |
What is the intermediate between a gene and its polypeptide? |
| A. | mRNA |
| B. | tRNA |
| C. | rRNA |
| D. | siRNA |
| Answer» B. tRNA | |
| 119. |
The first step in catabolism of lactose by the bacteria is ________________ of a linkage bond. |
| A. | hydrolysis |
| B. | oxidation |
| C. | reduction |
| D. | alkylation |
| Answer» B. oxidation | |
| 120. |
A single-stranded miRNA is composed of approximately how many nucleotides? |
| A. | 10 |
| B. | 13 |
| C. | 100 |
| D. | 22 |
| Answer» E. | |
| 121. |
Synthesis of which of following is directed by gene expression? |
| A. | chromosomes |
| B. | immune system |
| C. | other genes |
| D. | proteins |
| Answer» E. | |
| 122. |
Which of following term describes different ways of cutting mRNA? |
| A. | spliceosome |
| B. | alteRNAtive RNA splicing |
| C. | mRNA cutting complex |
| D. | alteRNAtive cutters |
| Answer» C. mRNA cutting complex | |
| 123. |
How many codons codes for one amino acid? |
| A. | 1 |
| B. | 10 |
| C. | 20 |
| D. | 4 |
| Answer» B. 10 | |
| 124. |
Which type of RNAs suppress the movement of transposons in the germline? |
| A. | mRNAs |
| B. | piRNAs |
| C. | miRNAs |
| D. | tRNAs |
| Answer» C. miRNAs | |
| 125. |
The genetic code is degenerate. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 126. |
In what percentage of cancer does ras mutations occur? |
| A. | 29 |
| B. | 90 |
| C. | 40 |
| D. | 30 |
| Answer» E. | |
| 127. |
Modified version of which of following acts as 'cap'? |
| A. | guanine |
| B. | cytosine |
| C. | adenine |
| D. | uracil |
| Answer» B. cytosine | |
| 128. |
Defect or absence of which of following key enzymes can lead to albinism? |
| A. | melanin |
| B. | Tyrosinase |
| C. | melanocyte |
| D. | kinase |
| Answer» C. melanocyte | |
| 129. |
Enzymes of __________________________ are clustered together in a bacterial operon. |
| A. | metabolic pathway |
| B. | transcription |
| C. | transfusion |
| D. | transformation |
| Answer» B. transcription | |
| 130. |
Which of following mutations changes one amino acid to another? |
| A. | missense mutation |
| B. | point mutation |
| C. | substitution |
| D. | addition |
| Answer» B. point mutation | |
| 131. |
“Degron” is a __________ |
| A. | enzyme |
| B. | polypeptide |
| C. | amino acid sequence |
| D. | nucleic acid sequence |
| Answer» D. nucleic acid sequence | |
| 132. |
Which of following determines sex in fruit fly? |
| A. | alteRNAtive RNA splicing |
| B. | post transcriptional modification |
| C. | ribozymes |
| D. | alteRNAtive protein folding |
| Answer» B. post transcriptional modification | |
| 133. |
Proteins that terminate in arginine are short-lived. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 134. |
Nucleotide triplet on tRNA is called |
| A. | codon |
| B. | anticodon |
| C. | tRNA sequence |
| D. | mRNA |
| Answer» C. tRNA sequence | |
| 135. |
When was the operation mechanism of a bacterial operon first elucidated? |
| A. | 1961 |
| B. | 1971 |
| C. | 1981 |
| D. | 1991 |
| Answer» B. 1971 | |
| 136. |
How do bacteria often respond to environmental change? |
| A. | self destruction |
| B. | stopping replication |
| C. | regulating transcription |
| D. | regulating translation |
| Answer» D. regulating translation | |
| 137. |
Nontranscribed spacer is not transcribed. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 138. |
Aggregated clusters of rDNA in a cell are called _______________ |
| A. | nucleoli |
| B. | chromatin |
| C. | chromosome |
| D. | ribosome |
| Answer» B. chromatin | |
| 139. |
What is group of distal control elements called? |
| A. | inducers |
| B. | enhancers |
| C. | promoters |
| D. | initiators |
| Answer» C. promoters | |
| 140. |
Which of the following RNAs are highly conserved? |
| A. | let-1 |
| B. | pet-1 |
| C. | let-7 |
| D. | pet-7 |
| Answer» D. pet-7 | |
| 141. |
Transcription is the synthesis of ______________________ |
| A. | RNA |
| B. | DNA |
| C. | Protein |
| D. | Polypeptide |
| Answer» B. DNA | |
| 142. |
What does 'c' in cAMP stand for? |
| A. | cyclic |
| B. | combination |
| C. | carrier |
| D. | counter |
| Answer» B. combination | |
| 143. |
When human cell is subjected to stressful condition ___________________ is activated. |
| A. | protein kinase |
| B. | isomerase |
| C. | synthetase |
| D. | helicase |
| Answer» B. isomerase | |
| 144. |
The degradation of mRNA begins, when its tail reduces to _________ residues. |
| A. | 2 |
| B. | 3 |
| C. | 20 |
| D. | 30 |
| Answer» E. | |
| 145. |
Which of the following is a contributor of mRNA stability? |
| A. | Temperature |
| B. | Poly(A) tail |
| C. | Guanosine |
| D. | Uacil |
| Answer» C. Guanosine | |
| 146. |
Messenger RNA from which gene is localized at the anterior end of fruit fly? |
| A. | oscar |
| B. | bicoid |
| C. | tricoid |
| D. | coloid |
| Answer» C. tricoid | |
| 147. |
RNA editing is the mechanism in which specific amino acids are converted after _______________ |
| A. | transcription |
| B. | translation |
| C. | mutation |
| D. | splicing |
| Answer» B. translation | |
| 148. |
Which of the following are untranslated regions of messenger RNAs? |
| A. | UVs |
| B. | UTs |
| C. | UTRs |
| D. | URs |
| Answer» D. URs | |
| 149. |
Pre-synthesized mRNAs are stored in the __________________ in an inactive state. |
| A. | nucleus |
| B. | cytoplasm |
| C. | nuclear membrane |
| D. | plasma membrane |
| Answer» C. nuclear membrane | |
| 150. |
One of the key-enzymes involved in gluconeogenesis is ______________ |
| A. | phosphoenolpyruvate carboxykinase |
| B. | phosphoenolpyruvate carboxylase |
| C. | phosphoenolpyruvate ethanol |
| D. | phosphoenolpyruvate esterase |
| Answer» B. phosphoenolpyruvate carboxylase | |