Questions tagged [homework]

This tag indicates that the question is likely based on a home assignment in biology-related university or high school courses or is about an elementary concept that may seem trivial to biology professionals. Please see the homework policy on meta before asking homework questions.

Filter by
Sorted by
Tagged with
1
vote
0answers
37 views

What is the best food to eat at this type of day since it is so vey very late? [closed]

Best food to eat? In this time of the day because it's late very soon to be
16
votes
2answers
12k views

Solving Hardy Weinberg problems

I really fail to understand Hardy-Weinberg equilibrium and can't find an easy enough source of information. Can you help me to understand Hardy-Weinberg equilibrium? My goal is to be able to solve ...
6
votes
1answer
2k views

Digestion of milk in humans

The intial step in the digestion of milk in humans is carried out by which of the following enzymes? A) lipase. B) trypsin. C) rennin. D) pepsin. I'm confused between the C and D option. as it'...
3
votes
0answers
146 views

For which taxonomic levels are xylotomical, embryological, and palynological evidence each most useful in determining species relationships?

From the 2010 USABO Semi: In plant systematics, three lines of evidence may be useful in determining relationships; xylotomical (wood anatomy), embryological and palynological. Match these ...
1
vote
0answers
1k views

Solute potential of sucrose relative to NaCl

Does 1M NaCl or 1M sucrose solution have a more negative solute potential? I was thinking that for the same volume of solution, (eg 1 dm^3) there will be 2 mol of ions in NaCl solution and 1 mol of ...
0
votes
1answer
325 views

Signaling pathways with Receptor Tyrosine Kinase clarification

This question is regarding signaling pathways with RTKs, Receptor Tyrosine Kinase. The picture posted has one thing wrong with it and I am supposed to figure out what that is. What I have come up ...
0
votes
1answer
51 views

Boiling A frog in a sous vidè bath [closed]

So if i were to use a sous vidè water bath and a frog and slowley raised the temperature say 1 to 2 degrees a day would they survive harsh boiling water through thermoregulation
5
votes
1answer
334 views

Problem with an analogy (Cell Membrane)

I'm studying biology for the first time seriously. I've been reading OpenStax College's material. In the section of "The Cell Membrane", I have the following problem: Choose the answer that best ...
2
votes
2answers
299 views

Question on Viruses [closed]

A recent study has provided evidence that two types of equine (horse) herpes viruses have an unusually broad host range. This fact supports which of the following statements? a. The lytic cylce ...
4
votes
1answer
133 views

DNA mutations in CHO-KI mammalian cells

The mammalian cell line CHO-K1 has 24,383 genes. After 70 doublings (from a starting number of cells, 1) a total of ~4,000 mutations have occurred in the overall population of cells (i.e. not all in ...
1
vote
1answer
270 views

Terminology regarding sensory receptors

I was recently asked the following question: Compare the following pairs of receptors in the same sensory system. Include in your discussion: The distribution in the sensory epithelium;...
1
vote
0answers
776 views

When is it unacceptable to measure dry mass in an experiment to measure growth of plants?

I'm an A level student (British high school final year) and I was doing an exam question which asked for the design of an experiment to test the effect of light intensity on the growth of a certain ...
1
vote
1answer
289 views

Diploid cells and number of chromosomes

I'm struggling to get a hang on this. I'm getting confused by this sentence from one of my tests: Each human diploid cell has two sex chromosomes and _____ autosomes. I'm guessing they're meaning 46,...
1
vote
1answer
2k views

What is the meaning of “The Molecular Basis of Disease” [closed]

What is the exact meaning of The Molecular Basis of Disease? I have one assignment which involves presenting Molecular Basis of a Disease. I am not really sure what points to add.
6
votes
2answers
4k views

What is the difference between the evolution of fins in whales and fish?

For a homework assignment I received the following question: Which statement best explains the evolution of fins in whales and fish? a. The common ancestor of whales and fish possessed genes for ...
2
votes
1answer
208 views

Molecules responsible for reading amino acid language

The molecules responsible for reading the language of amino acids and nucleotides is: RNA polymerase enzyme mRNA tRNA DNA I don't actually understand what "reading amino acid ...
3
votes
2answers
132 views

Homework problem:Introductory genetics

The problem is as following: Primary Ciliary Dyskinesia (PCD) is caused by an autosomal recessive gene. 50% of patients with PCD also have Kartagener Syndrome. Josh has Kartagener Syndrome. What is ...
1
vote
1answer
252 views

Adding the Propionyl-CoA Pathway to E.coli

So I'm trying to simulate the production of 3-Hydroxypropionic Acid with E.coli via the Propionyl-CoA Pathway. However I'm not really sure how the production in the pathway goes. I got the following ...
1
vote
1answer
276 views

How to know what the expected value is? [closed]

I am confused as to how I was meant to know E for a X^2 test in the following question: 2.i and 2.ii give no more information. Not knowing what to do I used E as 0 for the first row and 40 (3+37) ...
1
vote
1answer
267 views

Complementation cloning: what, why and how? [closed]

I get that you're cloning a whole cDNA library, but why does E. coli need a complementary gene to allow the gene expression? Why is that complementary gene considered to be a mutant? AND how does ...
3
votes
3answers
804 views

Is the start codon regarded as part of the UTR (untranslated region)?

The Wikipedia entry for Gene contains the statement: The transcribed pre-mRNA contains untranslated regions at both ends which contain a ribosome binding site, terminator and start and stop codons. ...
0
votes
1answer
122 views

How closely related will your descendants be to you?

I wonder how similar my DNA will be to that of my great-grand-children. If a new person enters my family tree every new generation, he/she will bring in half of his/her DNA, therefore decreasing the ...
3
votes
1answer
576 views

Is some of the energy of food lost during digestion?

I know that chemical energy of food is converted to heat energy to be used by the body in many metabolic reactions. Specifically, I know that the breaking down of bonds is what releases energy. Does ...
2
votes
2answers
681 views

How are germ cells not reduced in number?

If germ cells produce haploid daughter cells by meiosis and are thereby "consumed" (where there was a germ cell there are then 4 daughter cells), where do the germ cells come from? I asked my biology ...
5
votes
1answer
505 views

Cellular respiration — How is the water expelled?

The equation of cellular respiration is as follows: 6 O2 (g) + C6H12O6 (aq) $\rightarrow$ 6 CO2 (aq) + 6 H2O (aq) + ATP How is the water produced expelled from the body (of course, after some ...
0
votes
1answer
3k views

Where did the nondisjunction occur?

A father with gene AC has a child with gene ACC. Where did the nondisjunction occur? (Meiosis I, Meiosis II, none of the above) I do not know because both Meiosis I and II have the possibility of ...
1
vote
0answers
34 views

How to read from flow chart

So I got the following picture and question: a) Assume that F1 = 10 mmol h$^{-1}$ and the flow is not negative (ie f$_i$ ≥ 0, i = 1, ..., 8). What is the most you can produce of the polymer DCDE (i.e....
1
vote
1answer
78 views

Are there more than Five kingdoms? [closed]

Is it true that scientists have disregarded their belief that there are five kingdoms and instead, they have theorized that there are multiple kingdoms?
2
votes
1answer
262 views

Which two organelles absorb acid? [closed]

I stain an unknown acid with purple dye. Later, you find the cell in two organelles. What are they? I am guessing that one of them is lysosomes, because they break down unwanted elements. What would ...
1
vote
1answer
280 views

Hardy Weinberg equilibrium [closed]

Hardy Weinberg would predict that the frequency of normal females, to carrier females, to affected females for colorblindness is equal to p$^2$ + 2pq + q$^2$=1. You were told that q=freq of the ...
1
vote
1answer
117 views

Why is it desirable to couple chemical production to growth?

I have the following question in systems biology: a) Draw a graph showing the relationship of growth (Vbio) and Vefni for the system here. (Let the horizontal axis represent Vbio and the vertical axis ...
3
votes
1answer
134 views

Plant identification: San Francisco, USA

I am taking a biology lab class and I need to identify all these plants which are from the San Francisco area. My question is how can I find the right keyword to find their names on internet? Or can ...
1
vote
2answers
589 views

Can a phenotype only have one allele?

A phenotype such as hair color like blonde hair. I am curious because mutations cause new alleles but does that mean that there always has to be a dominant or reccessive allele?
0
votes
1answer
68 views

Accurate surveys of urban pigeon and bird populations

I've been working on an assignment to develop mathematical models of urban pigeon populations. (As a disclaimer, this is part of a math course, not a biology course). I already understand the ...
1
vote
0answers
34 views

How could you measure the rate of light reactivity/ photosynthesis of a cell in a lab setting?

For a lab I must take Volvox protist cells and expose them to specific wavelengths of light. How would I know they're even reacting? The assignment I've been given does not explain what I should even ...
-2
votes
1answer
1k views

Which organelle is the easiest to see in a cell? [closed]

I was asked a question in class: "Which organelles are easiest to see in any cells while using a microscope?" This seems a little bit like a trick question, and since I'm not an expert in cellular ...
0
votes
0answers
84 views

Calculating gene separation -a genetics problem

I am really struggling with genetics. In particular, I have the following question Now I am OK with calculating the separation of genes in centrimorgans when I have data like so: But in the first ...
5
votes
1answer
173 views

Hardy Weinberg principle

The principle is that sum total of all allelic frequencies is 1. Individual frequencies for example can be named p,q.In a diploid cell , p and q represent the frequency of allele A and a respectively ...
1
vote
0answers
67 views

Thyroid transplanted to the abdomen

This question was posed in our endocrinology class, however I have no idea how to answer it: The thyroid gland of a 5-year old boy is transplanted from its normal position in the neck to the ...
6
votes
1answer
162 views

Evolution of Upside Down Catfish (Synodontis nigriventris)

My Biology teacher asked us to write 3 texts, explaining the evolution of the Upside Down Catfish Synodontis nigriventris, each one according to Lamarckism, Darwinism and Neodawrinism theories. She ...
6
votes
1answer
1k views

Explanation of universal model of energy flow

I am trying to understand the Universal model of energy flow by Odum. In this linked diagram I is the input energy(the amount of energy present in the food consumed by this tropic level, say its, ...
2
votes
1answer
314 views

Liebig's law of minimum

I was reading from Odum about Liebig's law of minimum. It said that the law is appicable in steady state condition i.e. when the inflow of energy and material balances out the outflow. I got two ...
1
vote
1answer
697 views

Sister chromatids during meiosis

Sister chromatids $A)$ Cross over during prophase I of meiosis $B)$ separate during the first mitotic division $C)$ are produced during $S$ phase between cell divisions $D)$ cross ...
1
vote
1answer
762 views

How can I determine where meiosis occurs in the life cycle of a plant?

To fill out this diagram with the mitosis, meiosis, and ploidy , we start with the definition that spores are haploid (N). Based on knowing that as the sperm and eggs are N, the gametophyte is also ...
2
votes
1answer
3k views

Why does the pH decrease, when adding pancreatin to different types of milk (cow milk, soy milk etc.)?

I'm experimentally observing how pancreatin affects the pH in different types of milk. Why does the milk's pH decrease when I add an enzyme solution to different types of milk (e.g., cow milk, soy ...
4
votes
1answer
716 views

conversion from cpm/mg to mg [closed]

I 've an essay about wheat sprout extract, there's a graph about protein content in first 4 day of wheat sprout. so under the graph there's this text Phosporylation by endogenous kinases of the ...
3
votes
0answers
51 views

How do spiders get silk from their spinnerettes?

I'm 13 and writing a report on spiders. How do they use the silk protein gel from the spinnerets? How does it get from the spinnerets to the web? P.S. I know how silk is created, all the way up until ...
0
votes
1answer
2k views

What two conditions does the closing of the stomata help to prevent?

I was given the following question: What two conditions does the closing of the stomata help to prevent? I know that one of them is transpiration, but multiple searches on google could not yield ...
1
vote
0answers
99 views

Interpretation of table on analysis of genetic diversity between groups

I am very confused about how to interpret Table 8.3 in Smith's Evolutionary Genetics. Is the GST in the table the same as the G,ST (with the comma), which is defined (pg. 156; Box 8.3) as "the ...
1
vote
0answers
20 views

Production of $CO_2$ basal metabolism test

Can the production of $CO_2$ be used as a type of basal metabolism test? Explain. The answer to this is obviously yes, but I don't know how to explain it. Would the following be a good explanation? ...