4,064 Answered Questions for the topic biology

Biology

01/14/21

In 1979, the estimated elephant population was 1.3 million and in 2007 it was 640,000. By approximately what percentage did the elephant population decline over this time period?
In 1979, the estimated elephant population was 1.3 million and in 2007 it was 640,000. By approximately what percentage did the elephant population decline over this time period? (Show your work.)... more
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Biology

01/14/21

 In 1979, the estimated elephant population was 1.3 million and in 2007 it was 640,000. By approximately what percentage did the elephant population decline over this time period?
 In 1979, the estimated elephant population was 1.3 million and in 2007 it was 640,000. By approximately what percentage did the elephant population decline over this time period? (Show your work.)... more
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Biology

01/14/21

Based on the area surveyed, where are the major hotspots of elephant decline? Where are elephant populations stable or increasing?
Turn off the 1979 and 2007 range layers and turn on the 2016 trends layers. Based on the area surveyed, where are the major hotspots of elephant decline? Where are elephant populations stable or... more
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01/13/21

Describe the difference between gene and chromosomal mutations, and how mutations in gametes may result in phenotypic changes in offspring.
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01/13/21

Biopolar Disorder

Can the manic episode last for 2 or 3 months when you have bipolar disorder?
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01/13/21

What does metabolic profiling study provide that is unique to the metabolomics alone and not to any other ''Omics'' ?
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01/13/21

What would be the consequence of a cell being unable to replicate its DNA?
a) The cell would not be able to undergo cell division as it normally wouldb) The cell would be unable to make proteins based on the information in DNAc) The cell would not form a nucleus, because... more
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01/12/21

Extraction blanks are essential within metabolomics experiments, which of the following statements are incorrect ?
A.) The extraction blanks are treated the same as the samples and undergo the same extraction procedureB.) The extraction blanks are used to identify artifacts such as plastic or solvent... more
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01/12/21

Which of these is an advantage of in-gel electrophoresis compared to gel-free approaches (choose one answer) ?
A.) Allows the type of protein modification to be identifiedB.) It is more sensitiveC.) Allows a greater range of proteins to be analyzedD.) Intract proteins allow detection of changes in protein... more
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01/12/21

Which of the answer(s) true ?
Which of the following is characteristic of the DNA methylation process ? Select one or ones that apply.A.) S-adenosyl methionine (SAM)B.) Histone acetyl transferases (HATs)C.) Histone deacetylases... more
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01/12/21

CFU per gram calculation
Hi!I took a sample of 5 grams of ground beef and diluted it to the factor 10^-6 with sterilized water. Afterward I took 1 ml of the the sample and used pour plate method to calculate amount of CFU.... more
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01/11/21

What are the signs and symptoms of metabolic acidosis?
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Biology

01/11/21

enzyme denaturing
Incubation of an enzyme at 38 degrees denatures the enzyme however if you add a substrate at the same temperature the enzyme is active. Why is this?Thanks
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Biology Biochemistry

01/06/21

HDAC inhibitors are can be used to treat cancer. The outcome of their molecular function is that they repress the acetylation of histones ?
HDAC inhibitors are can be used to treat cancer. The outcome of their molecular function is that they repress the acetylation of histones.True or False ?
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Biology

01/06/21

Gene promoter hypermethylation is often observed in cancer. ?
Q8. Gene promoter hypermethylation is often observed in cancer. What might be the consequence of this?Increased overall gene expressionDecreased overall gene expressionIncreased expression of genes... more
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Biology Biochemistry

01/06/21

METHYLATED DNA QUESTION
In general, when considering the role of epigenetic marks and gene expression which of the following statements is true;Unmethylated DNA combined with deacetylated histones in the gene promotor... more
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Biology

01/06/21

What type of cells contain chloroplasts?
What type of cells contain chloroplasts?
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01/06/21

What is the universal methyl donor which is used by DNA methyltransferase enzymes to methylate?
What is the universal methyl donor which is used by DNA methyltransferase enzymes to methylate DNA (and is utilised to methylate other biological molecules including histones)?1. Homocysteine2.... more
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01/06/21

Question about epigenetics

Q1. Epigenetics is defined as ‘Changes to the genome which are inherited from one generation to the next which alter _____ _____ but do not involve changes in the ____ _____’.1. gene sequence;... more
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Biology

01/05/21

An infection in the body might result in a sudden...
A.decrease in the activity of antigens produced by the mitochondriaB. in the amount of DNA present in the nuclei of cellsC.increase in the activity of white blood cellsD. increase in the number of... more
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01/05/21

How to answer this question ?
Dave's serum was analysed by capillary zone electrophoresis with a UV detector set at 210nm and a large potential paraprotein was seen (shaded in panel A). Subsequent immunofixation studies (not... more
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Biology

01/04/21

A biology question here “As more evidence gathers science is replaced with better science use real life example to explain this”
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12/27/20

How to do data and statistical analysis of data where the type of results and methodology are very different
Hello! I needed help with a systematic review that I am conducting. I have found some data but it is very different and I cannot combine it. I am measuring the complement resistance of certain... more
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12/27/20

How should I answer this question ?
Okay so this is the backround: A 45 year-old woman complaining of breast pain was diagnosed with having HER2-positive breast cancer. The patient underwent lumpectomy followed by a period of... more
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Biology Biostatistics

12/24/20

Smooth muscle contraction- graph!
Hi,I am provided with two experiments, with 2 tables of results, but I am unsure what graph I should use and what I should put on the x and y-axis.In the first experiment, trachea strips are put... more
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