02/06/20

Is it necessary for humans to be able to digest milk into adulthood? How could this be a benifit? Would you compare this to the loss of hemoglobin in icefish ? Why or why not?
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01/30/20

How is depression inherited? Is it a dominant trait, a recessive trait, a problem with the number of chromosomes, or something else?
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12/18/19

dna replication's synchronous qualification
      In DNA replication, due to the it's 5'to 3' direction and synchronous qualification, one of the strand(1) can be continuous the other strand(2) needs to DNA  ligase, okazaki... more
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11/23/19

42. Many tumor cells are able to divide uncontrollably in cell culture in the laboratory. Some of these cell lines have genomes with a mutant tumor suppressor gene...
1) Many tumor cells are able to divide uncontrollably in cell culture in the laboratory. Some of these cell lines have genomes with a mutant tumor suppressor gene. By adding a wild-type copy of... more
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11/19/19

Part 2: Dihybrid Cross—Predicting Flower Color and Seed Shape
Imagine that you are crossing two plants that are heterozygous for flower color and seed shape. The dominant and recessive alleles for these traits are as follows:purple flowers: Pwhite flowers:... more
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11/19/19

Do you think individuals should be allowed to have access to direct to consumer genetic testing? What are some of the benefits of this? On the other hand, what are some of the concerns?

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11/18/19

22. What is the molecular mechanisms that could contribute to punctuated evolution phenomenon?
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11/02/19

Explain mechanism that could cause methylated histone proteins to pack tightly together while causing acetylated histones to pack together very loosely
Can you propose a potential explanation for a mechanism that could cause methylated histone proteins to pack tightly together, inhibiting gene transcription, while causing acetylated histones to... more
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10/30/19

Imagine that a cell with a loss of function mutation in the G2/M checkpoint (in other words, the checkpoint is broken) is in G2 and has DNA damage. What is likely to happen to that cell?
a. it will never pass the checkpointb. it will pass the checkpoint once, but then it will stop progressing through the cell cyclec. It will pass the checkpoint and then accumulate additional... more
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10/30/19

Epidermal growth factor promotes cell division. In the absence of this growth factor, is a cell likely to continually go through all the cell cycle phases?
a. yesb. no please explain a little bit!
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10/30/19

During the cell cycle, which of the following is true of the cyclin:CDK complex specific for one phase of the cell cycle?
a. it is present only during that phaseb. it is constantly present at high levels in all phasesc. it is constantly present at low levels in all phases
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10/29/19

A star produces a continuous spectrum from its what?
Precise terminology, related to Astronomy, stars, spectrums
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10/22/19

Planetary Astronomy
In what ways did human personality/ego/foibles influence the discovery of Uranus, for better or worse?
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10/21/19

Why do a Punnett square and dominance/recessiveness not make any sense for bacteria?
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10/17/19

How do I solve this using the 5 steps of punnet squares?
In cats, fur color is X-linked. Black fur is dominant to yellow fur; he heterozygote produces tortoiseshell fur. a. Cross a tortoise shell female with a yellow male. b. Cross a black male with a... more
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10/17/19

Is chlorophyll the only molecule that absorbs light for photosynthesis?
yes or no and why? thank you!
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10/15/19

Gene therapy and mutation question

Dominant mutations can be categorized according to whether they increase or decrease the overall activity of a gene or gene product. Although a loss-of-function mutation (a mutation that... more
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10/12/19

Can spectrophotometry be used to determine the concentration of “colorless” solutes such as salt or sugar (or other soluble macromolecules like DNA or RNA)? Explain.
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10/06/19

Uploading pages
Is there a way to upload more than 30 pages to the whiteboard?Or can more then 30 pages be uplaodes and as we delete pages the new pages that were after 30 appear?We need to have the option of... more
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10/03/19

Axon's diameter size and their speed
I know that the Axon with largest diameter is the fastest. For the '' feeling the position of limbs in space'' this neuron and axon is used. And the axon with a very small diameter, is very slow.... more
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10/03/19

Why does biological tissue shrink in ethanol?

Moving aldehyde-fixed biological tissue (in my case, 200um thickness mouse brain slices) from water to ethanol shrinks them considerably, even when transitioning slowly. I know that ethanol moves... more
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09/27/19

At rest, the interior of a neuron is negatively charged relative to the exterior. The negative charge is due mainly to..?
sodium ions chloride ions potassium ions proteins I was thinking the answer is "2," but I am not positive.
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09/23/19

Can enzymes work with a wide variety of substrates, because they have a general shape
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06/24/19

Which of the two chromosomes in a pair is expressed?
I have completely dummy question.I have 23 pairs of chromosomes in the cells 23 single coming from my mother and 23 single from my father. So how my cell choose which chromosome, mother's or... more
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06/09/19

Why would lethal genes evolve?
I've been reading through 'The Selfish Gene' by Dawkins. At a few places in the book he states that incest is damaging because it would give a very high chance of lethal recessive genes becoming... more
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