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
-2
votes
0answers
19 views

List as many levels of organization as you can at which diabetes could be corrected

I got a question from a textbook <<Seeley's Anatomy & Physiology Twelfth Edition>> that does not have an answer at the back of the book (only odd numbered questions do have an answer ...
-1
votes
0answers
24 views

Genetic Crosses involving Deletion Mutations

I was working on question 6biii on an old question paper and our teacher gave us an extension question. If a plant that is heterozygous for the alleles of both genes (1 and 2) is crossed with a plant ...
-1
votes
0answers
37 views

Which of the following occurs after activation of the autonomic nervous system?

This was one of the questions on a test I was studying from. The question was: Which of the following occurs after activation of the autonomic nervous system? The answer choices were: a) pupils ...
0
votes
1answer
39 views

Does hormone participate in metabolic activites?

strong text My take on question- All hormone are not water soluble, some are fat soluble also so this option is definiely wrong. Thyroxine Hormone is do stored in the body in Follicle of thyroid ...
1
vote
1answer
56 views

How many cells are there in C. elegans in each hour of its life?

I'm a high school student planning to write a math essay to model changes in the number of cells in a living organism over time. C. elegans is the only organism that I know with a known number and ...
6
votes
1answer
133 views

How does increased resistance to flow decrease blood pressure?

I have recently encountered this question: Waldenström's macroglobulinemia is a condition which causes increased blood viscosity due to high protein content in the blood. How would Waldenström's ...
1
vote
2answers
105 views

Help with gene linkage and mapping!

Here's an interesting question I've been trying to figure out: My annotations are in red. So far, I've figured out: We know 630 colonies survived when plated with ACD antibiotics...meaning they ...
0
votes
1answer
240 views

Inoculating agar plates with microbes suspended in sterilised water?

We were having a problem with our experiment (culturing microbes on homemade nutri agar) so we decided to change our set-up. It already cost us quite some money. So, we saw this procedure. Can anyone ...
4
votes
1answer
3k views

How does aminoacyl-tRNA synthetase recognize different tRNAs?

There are about 20 aminoacyl-tRNA synthetases, one for each amino acid. Each aminoacyl-tRNA synthetase has a binding site that recognizes a specific amino acid, and other binding areas that recognize ...
3
votes
1answer
42 views

How much oxygen is released by Hemoglobin per 100ml blood

Question Red blood cells carry oxygen from lungs to the whole body. The percent saturation of hemoglobin with oxygen depends on the partial pressure of oxygen. Higher partial pressure of oxygen means ...
0
votes
1answer
86 views

How deep underwater could you breathe using a tube which breaks the surface until the water pressure makes it impossible to inhale air?

I'm struggling with a question asking how deep you can breathe underwater using a hollow reed before the water pressure makes it impossible to inhale. The question asked to use this data of maximal ...
2
votes
1answer
79 views

Number of homozygous recessive offspring

A question from the KVPY-SX examination, organised by the Indian Institute of Science (IISc) in Bengaluru, India, held on 3rd November, 2019. A plant heterozygous for height and flower colour (TtRr) ...
1
vote
1answer
106 views

Understanding Contig NG50

My goal is to do a de novo assembly of a jellyfish. At the moment I'm busy checking papers that did de novo assemblies but I also got some jellyfish papers Then I stumbled accross this: Contig NG50 ...
0
votes
0answers
27 views

Why bananas exposed in UVC light turn brown afterwards?

We have this research, where we test if our germicidal disinfection box is working and is functional by doing the banana test, where we expose the green banana to UVC and if the exposed peel turns ...
3
votes
1answer
6k views

Hardy-Weinberg Color-blind

In a city, 4% of male population have color blindness. How many of the female are (a) color blind carrier, (b) color blind? Suppose the city holds Hardy Weinberg equilibrium. My progress: 4% of male ...
0
votes
2answers
93 views

How can we know which alleles are together on a chromosome?

This illustration says that if the two homozygotes pr+ pr+ vg+ vg+ and pr pr vg vg are crossed to produce a heterozygous offspring (pr+ pr vg+ vg), then: this cross gives us exactly what we need to ...
0
votes
1answer
117 views

What is the map unit between the genes?

While doing some biology I came across this question: The following tables present results of plant crosses involving two linked genes: S is a seed-color gene, and L is a plant-height gene. Each gene ...
0
votes
1answer
85 views

Confusion about how to compute probabilities for linked genes

I am confused about how to compute probabilities for linked genes. The problem that I am solving is this: P generation: AAbbddEEff X aaBBDDeeFF. If A and B are 40 centimorgan apart, what is the ...
4
votes
1answer
61 views

renal portal system

I am a high school student. In my textbook it is written that Mammals don't have renal portal system because they have four chambered heart. I understand that the four chambered heart keeps the ...
3
votes
2answers
314 views

How do I determine this logistic growth model formula?

The Question Two yeast cells were placed into a special container to which food was continually added, to keep it at a constant concentration. All other factors were set for optimal yeast ...
-2
votes
1answer
60 views

What is the thickness of the membrane if only alpha helixes are embedded of a transmembrane protien?

Given is the representation of a transmembrane protein. Calculate the thickness of the membrane if only alpha helixes are embedded in it. One turn = 5.4Å Please read: The reason I didn't submit my ...
-2
votes
1answer
59 views

Check simple human fetus answers

Based on this image and questions, could someone please check my answers? Question 1: At which one of the following points will the blood passing the point be more oxygenated after birth than before ...
1
vote
2answers
122 views

Why do genes, encoding the same proteins and in the same conditions, have different expression?

Is it possible that two genes, which come from two different cell cultures and which encodes the same protein, produces different quantity of mRNA? If yes, why? My question comes from the fact that I ...
4
votes
1answer
23k views

How many cell membranes are oxygen and carbon dioxide diffuse through in the lungs?

In the lungs, oxygen and carbon dioxide pass through cell membranes by diffusion. Which row is correct? The correct answer is D, but I think it should be B. I can only think about three layers as ...
-1
votes
1answer
45 views

Am I reading this respirometer correctly?

I want to double check that I'm reading these respirometer vials correctly. The volume O2 of the following vials should be: Squirrels in Torpor: E1: 0.4 E2: 5.0 E3: 0.3 E4: 5.1 E5: 0.4 E6: 0 Squirrles ...
0
votes
1answer
107 views

Get "DNA" of one parent based on its children [closed]

I'm no biology expert so bear with me, but I've been given a task to estimate alleles of an animal based on the animal's children and the children's other parents. I've looked up Mendel's laws but I'm ...
1
vote
1answer
53 views

exercise of gene linkage in genetics

Could you help me solve this problem: AAbbCC is crossed with aaBBcc and the offspring re-crossed with aabbcc. Considering that A and B are linked and their distance is 12 mapping units, while the gene ...
1
vote
0answers
1k views

Locomotion of Hydra: Why Somersaulting is better than Loop locomotion when moving to a larger distance?

In my text I read about different types of locomotion of Hydra where I learnt that generally Hydra moves by somersaulting and it is faster than 'Loop locomotion' which Hydra uses for moving to a large ...
0
votes
0answers
43 views

3 primers to know if Homozygous, Heterozygous or WT

In this imaginary experiment, I am using T-DNA to make an insertional mutagenesis that will get randomly inserted into the DNA where it might get inserted within a gene, disrupting it. In order to get ...
-1
votes
2answers
56 views

Cystic Fibrosis Genetic Risk Determination

Let's say Jane has Cystic Fibrosis and we know her brother doesn't. What are the chances of her brother's future child having CF? (The chances of Cystic Fibrosis in the general population can be taken ...
1
vote
0answers
46 views

What are the advantages of long read sequencing for cancer oncogenomic research?

Currently I am using whole genome nanopore sequencing, Illumina short read and 10x linked read to study oncogenesis mechanisms of certain types of rare cancer. I am wondering about the advantages of ...
0
votes
1answer
1k views

Explain a transpiration graph

The solution is A, but I think both A and C are correct. For choice C, stomata that protected by hairs will have a greater amount of water vapour around them, hence lower water potential gradient. ...
0
votes
1answer
62 views

Should I consider one or two DNA chains to find how many nucleotides are in a gene?

I am trying to solve an exercise. How many nucleotides does a gene contain if information about 287 amino acids is encoded in it? What is the molecular mass and length of this gene? AFAIK, I have to ...
3
votes
1answer
150 views

Why is Ibuprofen contraindicated in asthma patients?

So yesterday a patient showed up at the clinic with a massive swelling in his left face region. Upon examination it was found to be due to infected first premolar. Dentist recommended him to get the ...
1
vote
1answer
313 views

What’s the Difference Between Grass and Sedge?

What’s the difference between grasses and sedges? in terms of anatomy and classification.
0
votes
0answers
78 views

Which condition is most likely to cause a buildup of materials in the lysosome?

Stated below, I must answer a question related to lysosomes. I am unsure of the answer, and have explained my reasoning after the question. Lysosomes contain hydrolytic enzymes that derive from the ...
-3
votes
1answer
200 views

Primary function of cell wall is [closed]

A. Controlling volume B. Providing shape C. It's selective permeability D. Protection against bursting To me, all the given options seem correct except C. A and D are correct when the cell is placed ...
5
votes
1answer
187 views

A mutation question from the Indian National Biology Olympiad

DNA was isolated from wild type (Gal+) and mutant (Gal-) E. coli cells and separated by density gradient centrifugation technique. DNA from Gal- strain acquired a lower position. This indicates that ...
1
vote
1answer
19k views

Calculating Possible Combinations of Bases in a DNA Strand of a Given Length

In my Biology class we were asked this question: This DNA strand consists of eight pairs of nitrogenous bases. How many different sequences of eight bases can you make? Explain how you found your ...
0
votes
0answers
63 views

Question regarding genetic variance and heritability

According to early studies (performed by Wright) on guinea pig coat color, the total variance in a randomly mating strain was 0.573. The variance in an inbred strain was 0.340. From correlations ...
-1
votes
2answers
63 views

Next Generation Sequencing False Negative [closed]

In Variant Detection, RNA-sequencing, and ChIP-sequencing, we showed how we matching, or aligning, short NGS reads to the genome, and then make inference using the reads which aggregate or "pile ...
0
votes
0answers
54 views

Help identifying a part of a flower

I researched about floral diagrams and this is what I found:- This is floral diagram of Theobroma cacao. I managed to identify others but this part near the stamens was not found anywhere. Also the ...
0
votes
1answer
52 views

bunsen vs meker for best sterile field [closed]

I need one bunsen and i have a friend that sells me a bunsen-meker burner. I see that bunsen-meker burners have more flame diameter, so should have more diameter of sterile field, but i dont know XD ...
2
votes
1answer
208 views

Is this question about limiting factors answerable?

This is from a Singapore-Cambridge GCE O-level Biology exam (a national exam for 16-year-olds). The exam board maintains that the question is "correct and accurate"—but isn't there a typo in ...
1
vote
2answers
28 views

Action potential attenuation in unmyelinated axons vs demyelinated axons

I learnt that action potentials travel much faster along myelinated axons, and when these axons are demyelinated the action potentials travel much slower and sometimes die out. Why do action ...
1
vote
2answers
7k views

Genes & Map Units

Two genes of a flower, one controlling blue (B) versus white (b) petals and the other controlling round (R) versus oval (r) stamens, are linked and are 10 map units apart. You cross a homozygous blue ...
0
votes
2answers
99 views

VPg priming of the replication of RNA viruses

I'm doing a presentation on the replication of SARS-CoV-2 for my chemistry class, and I found that to replicate its RNA, the virus uses RNA-dependent RNA polymerase, which is primed by a VPg primer. ...
0
votes
0answers
57 views

my way of solving the biology question

Pure-breeding tall and pure-breeding short pea plants in the P generation were crossed as shown below. Based on the diagram below, one can assume that a)short plant height is the dominant trait. b)...
0
votes
1answer
58 views

Are stroma lamellum and grannum lamellum the same?

I have a picture in my textbook that is confusing me as to how they are different.I tried looking for some info on the internet, but could'nt get it clear.Please help me.

1
2 3 4 5
12