Homework Answers
Multicellular eukaryotes increase the number of proteins encoded by their genome through different post transcriptional pathways referred as alternative processing pathways. In these pathways, a single pre-mRNA is processed in different ways to produce alternative types of mRNA, resulting in the production of different proteins from the same DNA sequence.
One type of alternative processing is alternative splicing. In this post transcriptional process, same pre-mRNA is spliced in more than one way to yield multiple mRNAs that are translated into different amino acid sequences and thus different proteins.
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12. Multicellular eukaryotes are much more complex than unicellular eukaryotes, but have similar total numbers of...
alternative splicing results in ________ more proteins than genes more genes than proteins equal numbers of...
alternative splicing results in ________ more proteins than genes more genes than proteins equal numbers of genes and proteins there is no relationship between splicing and the number of different proteins 2. mRNA splicing is most common in bacteria complex eukaryotes simple eukaryotes mitochondria 3. A gene that has an mRNA with a short half-life will be translated more than one with a long half-life will be translated less than one with a long half-life will not be translated at...
8. Which of the statements about the organization of complex multicellular organisms is false? Only some...
8. Which of the statements about the organization of complex multicellular organisms is false? Only some cells are in direct contact with the environment. Exterior cells receive environmental signals directly, whereas interior cells receive environmental signals indirectly Exterior cells are highly differentiated, whereas interior cells are not differentiated. Interior cells cannot grow as fast as exterior cells without mechanisms to transfer nutrients between cells. Signals transferred from exterior cells to interior cells can activate or repress gene expression in the...
all these questions have more than one correct answers 1) Meiosis & mitosis have similarities as...
all these questions have more than one correct answers 1) Meiosis & mitosis have similarities as well as differences. Which of the following represent similarities? a) Both increases genetic variation b) Both change in chromosomes number in daughter cells c) Both only occur in eukaryotes D) DNA replication must occur prior to both e) Both make use of a spindle to separate chromatids 2) Meiosis is a special form of cell division. Select any of the following that applies to...
D) Chidanans. E) nematodes. 10) Between organs and body wall, complex animals have a body cavity...
D) Chidanans. E) nematodes. 10) Between organs and body wall, complex animals have a body cavity called a A) cnidarian. B) mesoderm. C) mesoglea. D) coelom. E) thorax. 4) In the animal kingdom, cephalization is A) development of a body that has paired structures forming a side-to-side mirror image. B) concentration of sensory structures in the head. C) the ability to respond rapidly to external stimuli. D) evolutionary development of a netlike system of veins. E) development of eyes at...
I need help with numbers 1-4 Write out the chemical reactions in fermentation that are responsible...
I
need help with numbers 1-4
Write out the chemical reactions in fermentation that are responsible for (a) carbonation in beer and (b) the ethanol in vodka; include the names of the enzymes required. (c) Is acetaldehyde a reactant or product in these reactions?. Eduard Buchner is credited with discovering reaction conditions required for in vitro fermentation using protein extracts prepared from yeast. Louis Pasteur, at the urging of the local wineries in France, had also tried to reproduce fermentation...
The genome of a newly discovered bacterial species (Bacillus sanfranciscus) is sequenced and found to have...
The genome of a newly discovered bacterial species (Bacillus sanfranciscus) is sequenced and found to have a circular genome of 8.7 x106base pairs (bp). Open reading frame (ORF) analysis indicated the presence of 7,250 ORFs that encode proteins with an average length of 360 aa. What is the information content of this genome (i.e.– how much information can be encoded in this length of DNA)? Since the genetic code can be considered digital in nature, convert the information content of base pairs...
The genome of a newly discovered bacterial species (Bacillus sanfranciscus) is sequenced and found to have...
The genome of a newly discovered bacterial species (Bacillus sanfranciscus) is sequenced and found to have a circular genome of 8.7 x 106 base pairs (bp). Open reading frame (ORF) analysis indicated the presence of 7,250 ORFs that encode proteins with an average length of 360 aa. a. What is the information content of this genome (i.e. – how much information can be encoded in this length of DNA)?Since the genetic code can be considered digital in nature, convert the...
10. 10. When considering regulation of gene expression A. miRNA/RISC complex binding will lead to degradation...
10.
10. When considering regulation of gene expression A. miRNA/RISC complex binding will lead to degradation of target mRNA. B. siRNA/RISC complex binding will halt translation of the target mRNA. C. proteins are destroyed by the proteasome using GTP energy D. labeling of proteins for destruction by the proteasome requires ATP energy 11. When comparing the epigenomes of normal and cancerous breast epithelial cells A. cancerous cells increase the methylation of genes that promote cell growth. B. cancerous cells increase...
1 What is an imprinted gene? Select one: a. A gene that is found on a...
1 What is an imprinted gene? Select one: a. A gene that is found on a Barr body b. A gene that is silenced upon inheritance from a designated parent c. A gene that is inherited from only one parent d. A gene that is encoded on only one of the two copies of a chromosome Question 2 Which of the following is NOT a typical characteristic of cancer? Select one: a. Malignant cancers are typically not able to metastasize...
O c. Mutations are the ultimate source of genetic variation d. More individuals are born than...
O c. Mutations are the ultimate source of genetic variation d. More individuals are born than will survive. e. Individuals that possess the most favorable variations have the best chance of reproducing. en 44 If the bacterium Mycobacterium tuberculosis experiences a significant cost for maintaining a specific antibiotic-resistance gene, what would you expect to happen in environments that lack that antibiotic? answered Out of 2.00 question Select one: a. Bacteria with the resistance gene would try to make the cost...
8. Which of the statements about the organization of complex multicellular organisms is false? Only some cells are in direct contact with the environment. Exterior cells receive environmental signals directly, whereas interior cells receive environmental signals indirectly Exterior cells are highly differentiated, whereas interior cells are not differentiated. Interior cells cannot grow as fast as exterior cells without mechanisms to transfer nutrients between cells. Signals transferred from exterior cells to interior cells can activate or repress gene expression in the...
D) Chidanans. E) nematodes. 10) Between organs and body wall, complex animals have a body cavity called a A) cnidarian. B) mesoderm. C) mesoglea. D) coelom. E) thorax. 4) In the animal kingdom, cephalization is A) development of a body that has paired structures forming a side-to-side mirror image. B) concentration of sensory structures in the head. C) the ability to respond rapidly to external stimuli. D) evolutionary development of a netlike system of veins. E) development of eyes at...
I
need help with numbers 1-4
Write out the chemical reactions in fermentation that are responsible for (a) carbonation in beer and (b) the ethanol in vodka; include the names of the enzymes required. (c) Is acetaldehyde a reactant or product in these reactions?. Eduard Buchner is credited with discovering reaction conditions required for in vitro fermentation using protein extracts prepared from yeast. Louis Pasteur, at the urging of the local wineries in France, had also tried to reproduce fermentation...
10.
10. When considering regulation of gene expression A. miRNA/RISC complex binding will lead to degradation of target mRNA. B. siRNA/RISC complex binding will halt translation of the target mRNA. C. proteins are destroyed by the proteasome using GTP energy D. labeling of proteins for destruction by the proteasome requires ATP energy 11. When comparing the epigenomes of normal and cancerous breast epithelial cells A. cancerous cells increase the methylation of genes that promote cell growth. B. cancerous cells increase...
O c. Mutations are the ultimate source of genetic variation d. More individuals are born than will survive. e. Individuals that possess the most favorable variations have the best chance of reproducing. en 44 If the bacterium Mycobacterium tuberculosis experiences a significant cost for maintaining a specific antibiotic-resistance gene, what would you expect to happen in environments that lack that antibiotic? answered Out of 2.00 question Select one: a. Bacteria with the resistance gene would try to make the cost...
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