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Q 1/167
Score 0
What is the primary function of DnaA proteins in bacterial cells?
30
Initiate the assembly of the replication machinery at the origin of replication
Facilitate DNA repair mechanisms
Activate DNA transcription
Enhance DNA packaging into chromosomes
Q 2/167
Score 0
What is the name of the origin of replication in bacteria?
30
GammaC
BetaC
DeltaC
OriC
167 questions
Q.
What is the primary function of DnaA proteins in bacterial cells?
1
30 sec
Q.
What is the name of the origin of replication in bacteria?
2
30 sec
Q.
Which enzyme is responsible for unwinding the DNA double helix during replication?
3
30 sec
Q.
In which direction does DNA polymerase synthesize a new DNA strand during replication?
4
30 sec
Q.
Which of the following is NOT a component of a nucleotide in DNA?
5
30 sec
Q.
Which of the following best describes DnaA proteins?
6
30 sec
Q.
Where do DnaA proteins bind to initiate DNA replication in bacteria?
7
30 sec
Q.
What is the function of single strand binding proteins (SSBP) in DNA replication?
8
30 sec
Q.
Which of the following is true about single strand binding proteins in DNA replication?
9
30 sec
Q.
What is the function of DNA gyrase?
10
30 sec
Q.
What is the function of topoisomerase?
11
30 sec
Q.
Which enzyme type does DNA gyrase belong to?
12
30 sec
Q.
Which of the following statements is true about DNA gyrase?
13
30 sec
Q.
What is the specific function of a topoisomerase in DNA replication?
14
30 sec
Q.
Which class of enzymes does DNA gyrase belong to?
15
30 sec
Q.
What is the role of DNA gyrase during DNA replication?
16
30 sec
Q.
Which DNA polymerase is primarily responsible for proofreading and repairing DNA replication errors in E. coli?
17
30 sec
Q.
Which DNA polymerase enzyme in E. coli is known for its 5'-> 3' polymerase activity, 3'-> 5' exonuclease activity, and ability to remove RNA primers during replication?
18
30 sec
Q.
Which DNA polymerase enzyme in E. coli is responsible for synthesizing the majority of the leading strand during DNA replication?
19
30 sec
Q.
Which DNA polymerase enzyme in E. coli is primarily responsible for lagging strand synthesis during DNA replication?
20
30 sec
Q.
What is the main function of DNA ligase in DNA replication?
21
30 sec
Q.
What is the function of DNA ligase in the process of DNA replication?
22
30 sec
Q.
Is DNA replication bidirectional?
23
30 sec
Q.
What is DNA bidirectional replication?
24
30 sec
Q.
What is extrachromosomal DNA?
25
30 sec
Q.
What are plasmids?
26
30 sec
Q.
Which of the following is an example of extrachromosomal DNA?
27
30 sec
Q.
What is the primary function of rolling circle replication?
28
30 sec
Q.
Which direction does the leading strand of DNA synthesis proceed during rolling circle replication?
29
30 sec
Q.
What is the role of the primase enzyme in rolling circle replication?
30
30 sec
Q.
Which protein is known to initiate rolling circle replication in bacteria?
31
30 sec
Q.
What is the main function of RepA in rolling circle replication?
32
30 sec
Q.
Which specific region of the plasmid DNA does RepA bind to during rolling circle replication?
33
30 sec
Q.
Which of the following statements is true about plasmids in DNA replication?
34
30 sec
Q.
Which DNA replication feature is not present in plasmids?
35
30 sec
Q.
Where does DNA helicase bind on the DNA molecule?
36
30 sec
Q.
What is the primary function of DNA helicase?
37
30 sec
Q.
What is the central dogma of biology?
38
30 sec
Q.
What is a gene?
39
30 sec
Q.
Where are genes located within a chromosome?
40
30 sec
Q.
How are genes and chromosomes related in terms of genetic material?
41
30 sec
Q.
What does dsDNA stand for?
42
30 sec
Q.
What is the structure of dsDNA?
43
30 sec
Q.
Which nitrogenous bases are found in dsDNA?
44
30 sec
Q.
What is ssDNA?
45
30 sec
Q.
What is the function of ssDNA in the human body?
46
30 sec
Q.
What is transcription?
47
30 sec
Q.
What is DNA translation?
48
30 sec
Q.
What is a codon in DNA translation?
49
30 sec
Q.
What is the final product of DNA translation?
50
30 sec
Q.
What is the role of tRNA in DNA translation?
51
30 sec
Q.
Where does DNA translation take place in a cell?
52
30 sec
Q.
What is the function of an mRNA molecule in DNA translation?
53
30 sec
Q.
What is the role of the ribosome in DNA translation?
54
30 sec
Q.
What does the DNA TATA box do?
55
30 sec
Q.
What is the function of the TATA box within a gene's promoter region?
56
30 sec
Q.
What is a DNA promoter region?
57
30 sec
Q.
What is the function of a DNA promoter region?
58
30 sec
Q.
Are primers needed for RNA polymerase transcription?
59
30 sec
Q.
Why does RNA polymerase add new nucleotide bases from 5' to 3'?
60
30 sec
Q.
Which direction does RNA polymerase read the template strand?
61
30 sec
Q.
In which direction are new nucleotide bases added by RNA polymerase?
62
30 sec
Q.
Which of the following is NOT a type of transcription factor?
63
30 sec
Q.
Which of the following is true about transcription factors?
64
30 sec
Q.
How does transcription factors act in the role of gene expression?
65
30 sec
Q.
How do transcription factors interact with RNA polymerase during gene transcription?
66
30 sec
Q.
PreRNA becomes RNA after three steps. Which of the following are the three steps?
67
30 sec
Q.
Which of the following is true about transcription factors binding to the promoter region?
68
30 sec
Q.
Which type of RNA is involved in bringing amino acids to the ribosome during protein synthesis?
69
30 sec
Q.
Which type of RNA serves as the template for protein synthesis by carrying the genetic information from DNA to the ribosomes?
70
30 sec
Q.
Which type of RNA is the initial transcript of DNA that undergoes processing to become mRNA?
71
30 sec
Q.
Which type of RNA plays a structural role in ribosomes and helps catalyze the formation of peptide bonds between amino acids?
72
30 sec
Q.
Which type of RNA serves as an intermediary between DNA and protein synthesis by carrying specific amino acids to the ribosome?
73
30 sec
Q.
Which type of RNA undergoes splicing to remove introns and exons before being translated into a functional protein?
74
30 sec
Q.
Which type of RNA is responsible for catalyzing peptidyl transferase activity and ensuring the accurate formation of peptide bonds during protein synthesis?
75
30 sec
Q.
Which type of RNA is responsible for carrying out the genetic information coded in DNA to the ribosome?
76
30 sec
Q.
Which of the following is the first step for PreRNA to become RNA?
77
30 sec
Q.
What is the final step in the process for PreRNA to become RNA?
78
30 sec
Q.
Which of the following modifications is not essential for the stability of RNA molecules?
79
30 sec
Q.
Which step in the processing of PreRNA involves the removal of non-coding sequences?
80
30 sec
Q.
Which type of RNA carries amino acids to the ribosome during protein synthesis?
81
30 sec
Q.
What is the function of the 5' cap added to the mRNA molecule during post-transcriptional modification?
82
30 sec
Q.
What is the role of the Poly A tail added to the mRNA molecule during post-transcriptional modification?
83
30 sec
Q.
What is the term for the three-nucleotide sequence on tRNA that is complementary to the mRNA codon?
84
30 sec
Q.
What is the term for the process of removing intervening sequences from a pre-mRNA molecule to produce a mature mRNA?
85
30 sec
Q.
Which organelle is responsible for the translation of mRNA into protein?
86
30 sec
Q.
What is the importance of introns in mRNA processing?
87
30 sec
Q.
What is the term used to describe the coding regions of genes that are retained in mature mRNA?
88
30 sec
Q.
What percentage of the human genome is estimated to consist of introns?
89
30 sec
Q.
What is the role of splicing in the processing of pre-mRNA?
90
30 sec
Q.
Which small ribonucleoprotein is responsible for slicing out introns during pre-mRNA splicing?
91
30 sec
Q.
What is the function of small ribonucleoproteins (snRNPs) in eukaryotic cells?
92
30 sec
Q.
Which complex is formed by small ribonucleoproteins (snRNPs) and proteins to carry out pre-mRNA splicing?
93
30 sec
Q.
What is the function of the spliceosome in a cell?
94
30 sec
Q.
Which of the following statements about the spliceosome is true?
95
30 sec
Q.
What is the main role of the spliceosome in gene expression?
96
30 sec
Q.
What type of molecules are involved in the catalytic activity of the spliceosome during RNA splicing?
97
30 sec
Q.
What molecule is bound to the 5' end during the formation of the 5' cap in mRNA processing?
98
30 sec
Q.
What is the role of the 5' cap in mRNA processing?
99
30 sec
Q.
What is the function of the 5' cap added to RNA during transcription?
100
30 sec
Q.
Why does the addition of the 5' cap result in the RNA having two 3' ends?
101
30 sec
Q.
What is a Poly-A-tail?
102
30 sec
Q.
What is the function of the Poly-A-tail in mRNA?
103
30 sec
Q.
What is the relationship between the Poly-A-tail length and mRNA stability?
104
30 sec
Q.
What happens to the Poly-A-tail during the process of mRNA degradation?
105
30 sec
Q.
What is the role of the Poly-A-tail in translational efficiency?
106
30 sec
Q.
What is the function of tRNA anticodon in protein synthesis?
107
30 sec
Q.
How many loops are present in a tRNA molecule?
108
30 sec
Q.
Which part of the tRNA molecule contains the anticodon sequence?
109
30 sec
Q.
What is the significance of the 4 stems in a tRNA molecule?
110
30 sec
Q.
Identify the following structure
111
30 sec
Q.
In genetics, a codon is made up of how many nucleotides?
112
30 sec
Q.
What is a codon in genetics?
113
30 sec
Q.
How many possible codons are there in the genetic code?
114
30 sec
Q.
What is the name for the 3-nucleotide sequence in mRNA that codes for a specific amino acid?
115
30 sec
Q.
What is the function of stop codons in the genetic code?
116
30 sec
Q.
Which of the following is NOT a stop codon?
117
30 sec
Q.
How many possible codons code for amino acids, while the rest are stop codons?
118
30 sec
Q.
Which of the following is the start codon that initiates translation in the genetic code?
119
30 sec
Q.
Which amino acid has the start codon?
120
30 sec
Q.
In the loop of a tRNA molecule, what sequence of three nucleotides directly interacts with the codon on mRNA during translation?
121
30 sec
Q.
What is the function of the anticodon loop in a tRNA molecule?
122
30 sec
Q.
Which unit is commonly used to measure the rate of sedimentation of ribosomal subunits?
123
30 sec
Q.
Which ribosomal component is the smallest in size?
124
30 sec
Q.
What is the size of the 18s ribosomal RNA (rRNA) component in eukaryotic cells?
125
30 sec
Q.
Which ribosomal component is the largest in size?
126
30 sec
Q.
What does the 's' in 'svedberg' refer to?
127
30 sec
Q.
What is the function of the 18s ribosomal component in the ribosome?
128
30 sec
Q.
Which rRNA component forms part of the small ribosomal subunit?
129
30 sec
Q.
What is the function of pre-rRNA in ribosome biogenesis?
130
30 sec
Q.
Which of the following rRNA molecules is part of the large ribosomal subunit?
131
30 sec
Q.
During ribosome biogenesis, which of the following is the order in which the rRNA molecules are processed in eukaryotic cells?
132
30 sec
Q.
Which of the following is a characteristic of the large ribosomal subunit in eukaryotic cells?
133
30 sec
Q.
Which ribosomal subunit is responsible for decoding the mRNA and catalyzing the formation of peptide bonds during protein synthesis?
134
30 sec
Q.
Which subunit of the ribosome contains the peptidyl transferase activity?
135
30 sec
Q.
Which subunit of the ribosome contains the A, P, and E sites for tRNA binding?
136
30 sec
Q.
In protein synthesis, which site on the ribosome holds the tRNA carrying the growing polypeptide chain?
137
30 sec
Q.
Which site on the ribosome is responsible for holding the tRNA that carries the next amino acid to be added to the growing polypeptide chain?
138
30 sec
Q.
Which site on the ribosome is responsible for exiting the tRNA after it has transferred its amino acid to the growing polypeptide chain?
139
30 sec
Q.
During translation, which site on the ribosome is responsible for ribosomal RNA (rRNA) catalyzing the formation of peptide bonds between amino acids?
140
30 sec
Q.
Which site on the ribosome is responsible for holding the tRNA that has just released its amino acid to the growing polypeptide chain?
141
30 sec
Q.
Which site on the ribosome is primarily responsible for decoding the mRNA sequence and matching it with the correct amino acid carried by the tRNA?
142
30 sec
Q.
During translation, which tRNA site is where the peptidyl-tRNA is located, holding the growing polypeptide chain?
143
30 sec
Q.
Which of the following tRNA sites is generally not active during protein synthesis? During protein synthesis, generally only two remaining site are active with the one being dormant.
144
30 sec
Q.
What is a sense codon in genetics?
145
30 sec
Q.
How many sense codons are there in the genetic code?
146
30 sec
Q.
Which of the following is NOT a characteristic of a sense codon?
147
30 sec
Q.
What is a stop codon?
148
30 sec
Q.
What is another term for a stop codon?
149
30 sec
Q.
What is a wobble in the context of genetics?
150
30 sec
Q.
Why is the concept of wobble important in the genetic code?
151
30 sec
Q.
Which enzyme is responsible for the addition of an amino acid to the tRNA in circulation?
152
30 sec
Q.
Which enzyme is responsible for the removal of an amino acid from the tRNA at the ribosome?
153
30 sec
Q.
What is the role of aminoacyl-tRNA synthetases in protein synthesis?
154
30 sec
Q.
Is it possible for a tRNA to be bonded to the incorrect amino acid in circulation by aminoacyl-tRNA synthetases?
155
30 sec
Q.
Besides the 16S rRNA and the 23s rRNA, which other rRNA makes up the ribosomal complex in bacteria?
156
30 sec
Q.
The 70s subunit is unique in that it itself is consistent of two other subunits. What are the two subunits that make up the 70s subunit of bacterial ribosomes?
157
30 sec
Q.
What is the meaning of P site?
158
30 sec
Q.
What is the meaning of A site, the aminoacyl site?
159
30 sec
Q.
How is energy obtained during the ribosome processing of polypeptide chain building from GTP?
160
30 sec
Q.
What is a release factor in termination of translation?
161
30 sec
Q.
How many release factors are there at the termination of translation in bacteria?
162
30 sec
Q.
How many release factors are there at the termination of translation in eukaryotes?
163
30 sec
Q.
Which structure of a protein is characterized by twists and folds caused by the bonding of the amino acid R groups while still remaining flat dimensionally?
164
30 sec
Q.
Which structure of a protein is characterized by twists and folds forming a three dimensional figure based on the bonding of the R groups?
165
30 sec
Q.
What type of structure is a beta pleated sheet?
166
30 sec
Q.
What type of structure is a protein that consists of multiple proteins bonded together?
