Tag Info

New answers tagged

0

If you supply heat to a system the entropy increases and it will destabilize the order. This is a general thermodynamic principle and you can refer any basic book on that topic. However, it is not essential that all molecules would be affected equally. There are heat-stable enzymes in thermophiles such as Thermus aquaticus which are resistant to heat. Also ...


5

I will answer the questions one by one- Why does this miniaturization necessitates insulation ? Volume increases with a power of three with radius, while surface increases with a power of two. An organism's volume (and actually every (in)animate object) determines the total amount of heat that can be stored. It's surface determines how much heat ...


0

I think the answer should be C because when it is submerged, cutaneous respiration takes place and hence right atrium receives more oxygenated blood.


2

PCR ideally doubles the number of amplified DNA molecules in each cycle. So after the first step you have 10 molecules, after the second 20, the third 50 and so on. The formula for the calculation is: n × 2cycles = number of molecules n is the number of molecules you start your PCR with, cycles is the number of cycles used. In your case this would be: 5 ...


0

Hah! You can relax. There's no difference between RyrY and RrYy, as there is no fundamental ordering of genes like that. That being said, the standard convention would be to write RrYy (or at least RryY), so if your grader is a pedantic hardass they might take off a couple of points, but probably not the whole 16.


2

You are right but a small correction: P represents primary producers. So the answer is just dead plants or tissues such as broken branches. Death, excretion because of turnover (which includes urine or other metabolites), tissue turnover (shedding of dead cells, molting etc) Maintenance, locomotion, repair, immunity


1

There are always exceptions but you can consider some general rules. A is 1 i.e the sequence that is perfectly complementary (2 is complementary but direction is parallel — cannot base-pair), then B would be 1 (siRNA). Reasons (some are just based on general rules of siRNA design): siRNAs have to be perfectly complementary The size is also perfect for a ...


1

I also got 624. Maybe the answer is incorrect. My processing is: Each codon has four bases, the species contain five unique nucleotides, so for the first position in the codon, there are 5 possible results, also, for the second position in the codon, there are 5 possible results, it is same in third and forth position, so the result should be ...


1

vaccination is injecting the low or non-toxic substances that having a pathogen's identifying characteristics into human or animal body. When the animals exposed to the non-injurious pathogens, the immune system will produce a protective material, such as immune hormones, physiologically active substances and specific antibodies. When the animal re-exposure ...


0

I think T cell when presented to antigen (here vaccine) will produce memory T cell, which on next encounter with the same organism may act much faster and efficiently .so i think the correct answer is option D


3

Assuming you have stated the question correctly, the answer key is incorrect for exactly the reasons you have given and your reasoning and consequent answer are correct. I would double-check you have read the question correctly and then conclude the answer key is incorrect. It happens.


5

This is not as hard, as it first seems. Lets have a look at the single enzyme digests first: The digest with enzyme A and B only leads to products which are 5kB (5000 bp) away from each other. Since they are of the same size, both equally sized restriction fragments appear as one band. So each enzyme cuts the plasmid exactly in half. The double digest is a ...



Top 50 recent answers are included