What do we know now about the link between human diseases and gene mutations.

Thinking ahead to the remaining topics, what happens to histones bound to eukaryotic chromosomes before and during DNA replication and transcription?

Two purple sea slugs are mated with each other. Among their numerous offspring, 428 have a purple integument and 152 have orange integuments. With a chi-square test, compare the observed numbers with a 3:1 ratio and determine if the difference between observed and expected could be a result of chance.

There have been a number of studies indicating that schizophrenia is a complex genetic disorder. Which of the following observations are most consistent with this hypothesis? (select two answers)

Siblings of individuals with schizophrenia have an elevated risk of developing schizophrenia.

In monozygotic twins, if one twin has schizophrenia, it is very rare that the other is affected.

Malnutrition in utero and certain infections may increase risk of schizophrenia.

Schizophrenia follows an autosomal recessive inheritance pattern.

If you wanted to determine how many people were in your class, you would look around the room and count each individual. Even the smallest amounts of broth contain too many bacteria to count individually. To determine how many bacteria are in a given sample, microbiologists use a number of different methodologies including standard plate counts following serial dilutions, direct microscopic counts, determining the most probable number, using filtration followed by standard plate counts, measuring turbidity with a spectrophotometer, measuring the metabolic products of a population, and determining the dry weight of the cells in the culture. (1) Which of these methods are best to use to determine the number of viable cells? What do these methods have in common? (2) Which of these methods would you most likely use if you expected your density of cells to be very low? (3) Explain for which methodologies you might have to make a serial dilution and why dilutions may be necessary. (4) If you plated 1 ml of a 1:10,000 dilution and recovered an average of 27 colonies, how many cells per ml were there in the undiluted (stock) culture?

Can you pleasee answer these questions:

1. What are the mechanisms of tolerance used by resistant or engineered plants. Give an example.

2. What is the pesticidal crystal protein Bt.

3. What is Bt toxin mode of action, explain in detail.

Thank you in advance, I would appreciate it a lot, and I am grateful forever!!!

Discuss how the Human and Neanderthal OR1K1 proteins are similar and different including the implications on how this specific olfactory receptor may have functioned differently in Neanderthals compared to humans. Be sure to include the names of the amino acids that have changed and what impact you believe this change will have on the overall protein structure and function

BIOCHEM: Draw a Ramachandran plot for a 4-helix bundle protein.

*)Please walk me through how to draw the plot in detail if possible, as I really want to understand this concept well. Thank you!

is it a good idea to treat the flu with anti-bacterial antibiotics? Explain.

Explain what cells do (identify the role of an example cell, tissue, organ, system)

Classify cells based on their functions, size and shapes;

Sketch a cell, with key structural and functional specialisations noted;

Provide representative exemplar cells of the nervous and endocrine systems and relate their functional role to their morphological and subcellular specialisations;

Describe the structure and function of cell components and organelles; e.g. the cell membrane, cytoskeleton, the nucleus, mitochondria, endoplasmic reticulum, Golgi complex, ribosomes, etc.;

Define and classify tissue types and their functions (epithelial, connective, muscle and nervous tissues);

Provide examples of cells contained within tissues, how these are arranged into organs and systems (particularly in the context of the nervous and endocrine system).

Please list each different medical term in the following Case Study then provide a brief definition of each term.

A 44 years old male was brought into the hospital emergency room with complaints of thoracic angina. there was a suspension of the pneumonia so antibiotic were given but the patient continued to complain of persistent and worsening thoracic angina at which that point cardiac work up was ordered that involved having an electrocardiogram. the electrocardiogram diagnosed the patient with an acute myocardial infarction. most often is caused by an arterial thrombus.