1 During transcription, the base adenine in DNA pairs with the base ____ in the
ID: 1015043 • Letter: 1
Question
1 During transcription, the base adenine in DNA pairs with the base ____ in the new mRNA.
A guanine
B thymine
C cytosine
D uracil
2 DNA segments in eukaryotic cells which carry information for protein synthesis are called
a) introns b) exons c) heterogeneous DNA d) heterogeneous nuclear DNA
3 . Viruses infect cells by
a) embedding in cell membranes b) immediate destruction of cells c) injecting their nucleic acid into cells d) withdrawing cellular contents
4 To which of the following do amino acids bind during protein synthesis?
1) a) DMA b) tRNA c) rRNA d) mRNA
5 Chemicals which cause mutations are called
a )mutagens b) mutation c) genetic inhibitors d) genetic modifiers
6 What symptoms should an individual that has been stung by an insect exhibit that indicates anaphylactic shock?
a) the area about the sting becoming red and a tightening of the skin b) shortness of breath and swelling in the throat c) coughing, headache, and nausea d) all of these responses are symptoms of anaphylactic shock
7 phosphate-sugar-phosphate-sugar- is an example of a ____ backbone.
a) human b)chemical c) nucleic acid d) all the choices
8 A codon is a sequence of ____ nucleotide bases that represents a code word on mRNA molecules.
a) 2 b) 4 c)3 d)5
9 Which of the following drugs should a mother avoid while pregnant?
a) ethanol b) opiates c) testosterone d)all the choices
.
10 The following segment of a nucleic acid could be identified as(Points : 1) A GCTQ
B ATCG
C TACG
D GCAT
Explanation / Answer
1 During transcription, the base adenine in DNA pairs with the base ____ in the new mRNA.
Answer is D uracil
Note adenine always pair with thymine but in mRNA instead of thymine uracil is present
2 DNA segments in eukaryotic cells which carry information for protein synthesis are called
Answer is b) exons
3 . Viruses infect cells by
Answer is c) injecting their nucleic acid into cells
Note : virus infects the cell by attaching fibers of its protein tail to a specific receptor site on the cell wall and then injecting the nucleic acid into the host, leaving the empty capsid outside.
4 To which of the following do amino acids bind during protein synthesis?
Answer is b) tRNA
5 Chemicals which cause mutations are called
Answer is a )mutagens
6 What symptoms should an individual that has been stung by an insect exhibit that indicates anaphylactic shock?
Answer is b) shortness of breath and swelling in the throat
7 phosphate-sugar-phosphate-sugar- is an example of a ____ backbone.
Answer is c) nucleic acid
8 A codon is a sequence of ____ nucleotide bases that represents a code word on mRNA molecules.
Answer is c) 3
9 Which of the following drugs should a mother avoid while pregnant?
Answer is d)all the choices
10. question is not clear, image is not displayed in the question board to answer. pls send a correct question
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