Biology question and answers for November 16, 2023
- Q What is true about the lagging strand during DNA replication?It is synthesized in the 5' to 3' direction.It is synthesized before the leading strand.It has the same sequence as the...
- Q 1. A strand of DNA in a skin cell contains thebases:A-T-G-C-C-A-T-C-G-G-T-AAfter the cell is exposed to ultraviolet light, thestrand contains the bases:A-T-G-G-C-C-A-T-C-G-G-T-AWhich statement describes the result of thisexposure?(1) A new...
- Q Amino acids have an amino group, a R group, a hydrogen and a carboxylic acid group attachedto a central carbon. Amino acids differ only in their R groups. Circle the...
- Q The _ allele masks theother allele it is pairedwith.A. recessiveB. biggestC. most commonD. dominant
- Q The structure ofenzymes that justincludes folding ANDtwisting is called asecondary structure.A. beta pleatB. alpha helixC. theta helix
- Q Below is a sequence of DNA on the CSF1PO locus.CCTATCATGTAGTCAGGTACTGGACGGGTATGGTATGGTATGGTATGGTATGGTATGGTATGGTATAATCCGAGATGGAA) What is the STR region in the above DNA sequence?B) How many repeats does it have?
- Q Approximately half of all human cancers have defective p53. In these cancers, what else is commonlybe observed?Increased p21 expression and decreased DNA mutations.Increased p21 expression and increased DNA mutations.Decreased p21...
- Q If the haploid number for an organism is 24, the diploid number would beA. 72C. 12B. 24D. 48
- Q In the fruit fly, vestigial wings (small and useless) and ebony (black) body colour are produced by two recessive genes located on different chromosomes. The normal alleles, long wings and...
- Q During prophase, original maternal and paternal chromatids are matched up with ____. A. their copies C. chromatinB. different contromeres D. the mitotic spindle
- Q 2. Sickle Cell disease can result from a single mutation in the above DNA sequence. The underlinedthymine above is changed to a C below. Transcribe this section of DNA into...
- Q Phenylketonuria is a rare genetic disorder that is caused by a mutation in the PAH gene. Thisgene normally codes for the production of an enzyme that breaks down phenylalanine (found...
- Q Why do you think the eukaryotic DNA requires multiple origins of replication?A. Multiple origins help make more copies of the same DNA simultaneously.B. Eukaryotic organisms have unique DNA strands for...
- Q When biologists speak of a UNIVERSAL GENETIC CODE they are referring to the fact that, in nearly all organisms:A. The DNA sequences are identicalB. RNA information is transcribedC. RNA specifies...
- Q (Pierce worked problem) Suppose that a consensus sequence in the regulatory promoter of a eukaryotic gene that encodes enzyme A was deleted. Which of the following effects would result from...
- Q If a single bacterial cell that is sensitive to the antibiotic vancomycin is placed in a grown medium that contains vancomycin, it will die. Now consider another single bacterial cell,...
- Q In the 1920s, a dye (now called Feulgen stain) was developed that bound DNA in direct proportion to the amount of DNA present in cells. Upon binding, the DNA would...
- Q If, in humans, the DNA sequence TTTCTAGGAATA encodes the amino acid sequence LYS-ASP-PRO-TYR, what amino acid sequence will that same sequence specify in bacteria? Explain the evolutionary significance of this.
- Q Given the DNA sequence below, write out the nucleotides for the complementary mRNA segment that would be created as a result of transcription.3' AGT TTA CGG 5'5'.........................3'
- Q Answer the following using complete sentences.a) How did Mendel's work gradually gain acceptance.b) Describe how a cross between two closely related organisms may result in genetic problems.c) Are there any...
- Q Geneticists have discovered the existence of meiotic drive genes, which have alleles that, when present in a heterozygous state, are able to become incorporated into much more than 50 percent...
- Q A large population of animals is genotyped for many SNP loci across the nuclear genome. A high level of polymorphism is found at SNP loci over most of the genome....
- Q Which kind of genetic element has repeated DNA with units composed of 2 to 6 nucleotides, copied from a few to about 100 times?(A) minisatellite(B) intron(C) microsatellite(D) transposon(E) satellite
- Q Chloramphenicol binds to the 50S subunit of a 70S ribosome, which will interfere with...Transcription in prokaryotic cellsTranscription in eukaryotic cellsTranslation in prokaryotic cellsTranslation in eukaryotic cellsDNA synthesis
- Q According to the video "The antibiotic apocalypse explained", what caused an increased bacterial resistance to the antibiotic colistin in China?Colistin was an OTC (over-the-counter) medicine and people abused its useFarmers...
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