How would a dietary resin that absorbs bile salts reduce plasma cholesterol levels?

Explain how the primary transcript of a single eukaryotic gene can produce different proteins, using Drosophila sex-specific courting behavior as an example.

Briefly describe how genomic imprinting can be inferred from inheritance patterns in human pedigrees.

What are the names of the stem cell niche in leaves and roots, and when during plant development are they first formed?

can you put this in your own words?

Our class was divided into three groups and everyone followed the same procedure and steps. Each group had to keep track of their daphnia’s rate of growth based on how many lives and reproduce and how many die. To start off with this experiment, we had to come up a group name and then filled the “Daphnia life history data sheet” on which we recorded all our group member’s phone numbers and the date each person was responsible for collecting the information. We had total of seven 50 ml of plastic tube and we had them all labeled with our group name and the density of Daphnia. The tubes were labeled as follows: two tubes -1 D. magna per 2.0 ml of water, one tube – 1 D. magna per 1.0 ml of water and one tube of 1 D. magna per 0.5 ml of water. After that, we filled all of the tubes with 6 to 8 ml of well water that was in a big container. Throughout this whole experiment we used well water whenever we had to add water to the tubes. Then, our instructor provided us with three-day old Daphnia and after that we added Daphnia to the assigned tubes which are as followed: we added 5 Daphnia to tube labeled 1 D. magna per 2.0 ml of water and tube labeled 1 D. magna 1.0 ml of water received 5 daphnia each. Then these three-day old daphnia were obtained by placing egg in well water and collecting all the offspring that appeared during the next 24 hours. Then, we separated the adults form the babies and transfer the number of baby daphnia from their nursey to tube with a clean plastic dropper. We had to be really carefully when making the transfer so we don’t injure the daphnia. be careful to ensure that the tip of the dropper in submerged in the water before releasing the daphnia into your tubes. air bubbles can get trapped under the daphnia's carapace if you allow them to be exposed to the air. the, adjust the volume of water in each tube to 10 ml by adding or removing sufficient water with a dropper.

Convert alanine to the amino acid with the most rigid backbone. Use neutral groups.

As the cancer expert in the Biology Department at your school, NBC news contacts you to discuss the effects of bisphenol A (BPA) exposure on cancer risk. The reporter is very interested as she has read several articles on this topic. In particular she wants you to explain the following:

she has read that a combination of BPA with a high fat diet increase the risk of the offspring developing cancer while intake of some natural products (e.g., curcumin) can reduce the risk developing BPA-associated cancers. Can you design an in vivo study looking at the actions of BPA alone or in combination with either high fat diet or curcumin on mammary tumors in mice

These are all part of one question so it can be answered in paragraph format:

1. How is a theory different from a hypothesis?

2. How is a virus different from a bacterium?

3. Do viruses evolve?

4. List various factors that affect the current spread of COVID-19 in the biosphere.

5. How is correlation different from causation - particularly as it relates to the webquest below:

Recently reports have come out in the media and from scientists that people who have been vaccinated against with the MMR vaccine (particularly against measles) have a lower risk of developing SARS-CoV-2 (or least with a less serious infection).

GO DO A WEB QUEST OUT THERE ON THE INTERNET AND RESEARCH THIS A BIT. BE PREPARED TO ARGUE WHETHER OR NOT YOU THINK THIS IS CORRELATION OR CAUSATION

Bob and Mary both suffer from Sickle Cell Disease, an autosomal recessive condition (they have the condition - they are not just carriers). They met in a support group and against their doctor's advice, decide to have a child. What is the probability that their child will NOT have Sickle Cell Disease?

1. The _____ checkpoint can only be passed if the right growth factors have been received from other cells

   		G1/S
   		G2
   		G2/M
   		S

The protein hemoglobin, which carries oxygen in red blood cells, is a protein complex that consists of 4 separate subunits encoded by 2 genes: One gene encodes the two alpha-globin subunits while the other encodes the two beta-globin subunits. Four functional subunits (2 of each kind) are needed for a functional complex.

If a person carries just one mutant allele for alpha-globin, any complexes containing a copy of the mutant protein are nonfunctional, even if the other alpha-globin subunit is normal. As a result, almost all the hemoglobin produced is nonfunctional.

This is an example of a      mutation.

What gametes are possible from the parental genotype XXYyZz?

SELECT ALL THAT APPLY, but be aware that incorrect choices count against you.

Biochemistry Question

In hypoglycemia, the liver is not utilizing glucose as an energy source while the rest of the body continues to use glycolysis to generate ATP. Explain in detail why this happens. Also, why is the liver not using glucose?

In chickens, a large comb is dominant over a small comb. The gene for comb size is located on an autosome and large combs are inherited in an autosomal dominant fashion. However, roughly 10% of chickens that have the large comb allele nevertheless have a small comb. This is an example of...

Which of Mendel's Laws refers to the events in Metaphase I of meiosis?

A woman with type A blood has a baby with a man who has type B blood. What are the possible blood types of the baby?

SELECT ALL THAT APPLY but be aware that incorrect answers count against you.

In birds, blue feather color is dominant to yellow feather color, long beaks are dominant to short beaks, and

noisy is dominant to quiet.

On your own paper, draw a forked-line diagram of the cross BbLlNn x bbLlNn and use it to match the phenotypes below to their expected frequencies.The same frequency may be chosen more than once and some frequencies may not occur at all.

A preliminary study of a human T-cell clone indicates that it has been derived by cloning a regulatory ?? T cell. Therefore, the subsequent analyses are expected to detect the presence of [complete the sentence and assess the resulting statements (83-94) as either factually correct (= true) or incorrect (= false)]:

83. TCR ? chain mRNA.

84. CD8 mRNA.

85. CD4 mRNA.

86. AIRE mRNA.

87. IL-2R ? chain mRNA.

88. FoxP3 mRNA.

89. MHC class I ? chain mRNA.

90. MHC class II ? chain mRNA. 91. ?2-microglobulin mRNA.

92. IgG heavy chain DNA.

93. TCR ? chain DNA.

94. TCR ? chain DNA.

Immunological features differentiating naïve B cells activated in primary immune responses from memory B cells functioning in secondary immune responses include the fact that [complete the sentence and assess each subsequent statement (1-7) as either factually correct (true) or incorrect (false)]:

8. the frequency of antigen-specific B cells is lower in secondary immune responses.

9. higher levels of IgM are produced in secondary immune responses.

10. the level of somatic hypermutation is higher in secondary immune responses.

11. B cells do not require T-cell help in secondary immune responses.

12. memory B cells express higher levels of MHC class II molecules.

13. naïve B cells express higher levels of co-stimulatory molecules.

14. the antibody produced is of higher affinity in secondary immune responses.