1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
lys-0071 [83]
3 years ago
15

In yeast, one haploid strain is unable to synthesize uracil but able to synthesize leucine, while

Biology
1 answer:
Ket [755]3 years ago
3 0

Answer:

The two genes are come from one chromosome.

Explanation:

a. One haploid can synthesize uracil, another one can synthesized leucine. Assume that there is not any mutation, two different amino acids should be encoded by different genes.

b. The genotypes of two haploid strains are different. Each has contained single chromosomes, as same as gametes in any Eukaryotic organism.

c. Firstly, yeast is an Eukaryotic organism, diploid. It means they have chromosomes in pair. Secondly, haploid cell contains half of the chromosomes from parent cell. Due to the theory of meiosis, the half chromosome encoding leucine go to one haploid cell, the other encoding uracil go to another haploid cell. If they are from different chromosomes, there is a chance to have a haploid which can produce both uracil and leucine. Thus, the only possible answer is that they are from a chromosome in opposite long-arm or short-arm of the chromosome, which is later divided into two haploid.

d. There is not any haploid strain which is able to produce both uracil and leucine.

You might be interested in
Spider silk is a material made of proteins that has a strength per gram that is five times that of steel. One feature of some of
stepan [7]

Answer:

glutamic acid, because the R group could form ionic bonds

arginine, because the R group could form ionic bonds

tryptophan and tyrosine, because the R groups are small, allowing close stacking

glycine and alanine, because the R groups are small, allowing close stacking

6 0
3 years ago
Give two reasonsthat may account for the continuous firing of a<br> PostsynapticNeuron.
lyudmila [28]

Answer:

1.Continuous diffusion of negatively charged ions into the postsynaptic neurons , <u>which  leads to continuous reversal of charges (hyperpolarization) and therefore continuous firing of action potential</u>

2. Inhibition of hydrolytic enzymes e.g (acetycholinesterase)   that  metabolize activities of  cholinergic   neurotransmitters  e,g acetycholine at post synaptic cleft. leading to firing of action potential.

Explanation:

Neuron whose dendrites  transmits action potential to the  neuromuscular junction is called presynaptic neuron. While  neuron that  transmit action potential away from the neuronal synaptic junction, or from the neuromuscular  junction to the cell body of adjacent neuron or to effectors (gland and muscles) are called  post synaptic  neuron.

The more  negatively charged ions that diffused into the post synsptic neuron, the more depolarization, and the greater the frequency of action potential produced

The inhibition of  activities of hydrolytic enzyme which metabolize cholinergic neurotransmitter leads to  continuous   excitatory activities  of cholinergic neurotransmitters   on  the receptors at the postsynaptic neuron, and the more  action potential

6 0
3 years ago
-What is realistic personal goal you have for yourself in terms of living environmentally
ddd [48]

Answer:

Electric is the way so ive got to ask you

Do You Know Da Way

Because Dis Is the way :)

Explanation:

4 0
2 years ago
Which statement describes a characteristic of a spiral galaxy?
artcher [175]

Answer:

If your just looking for a description here you go.

Explanation:

Most spiral galaxies contain a central bulge surrounded by a flat, rotating disk of stars. The bulge in the center is made up of older, dimmer stars, and is thought to contain a supermassive black hole. Approximately two-thirds of spiral galaxies also contain a bar structure through their center, as does the Milky Way.

Hope this helps.

4 0
3 years ago
While doing field research, two scientists discover
zysi [14]

Angiosperms, dicots

Explanation:

Angiosperms are highly differentiated vascular plants which can produce flowers and bear fruits with seeds in them. These flowering plants undergo reproduction and produces new plants. The reproductive parts like ovules and ovaries, stigma, stamen, pollen are all present in the flowers.

Angiosperms can either be a monocot or dicot. If they contain two embryonic leaves or cotyledons they are referred as dicots. Flowering angiosperms like geranium, magnolias are all dicots.

Geranium is a dicot angiosperms that produces small purple flowers.

Gymnosperms or bryophytes do not bear flowers or fruits. Monocots have only embryonic leaf.

5 0
3 years ago
Read 2 more answers
Other questions:
  • What is the purpose of transcription?
    10·2 answers
  • How does trypanosoma brucei move
    6·1 answer
  • the bacteria bacillius anthracis which cause anthrax has been developed as a biological warfare agent. which of the following ab
    13·1 answer
  • what is the sensitivity of freshwater wetland? I have to give three pieces of evidence and explain why it is sensitive or why no
    12·1 answer
  • Plants and animals die without air. Why? Which gases do plants and animals inhale and exhale? What are the role of these gases i
    8·1 answer
  • Which of the following had the biggest impact on species growth and diversity?
    7·1 answer
  • If a couple had a baby who died and could not have any more babies, but had the opportunity to clone their baby, should they be
    8·1 answer
  • Mitosis can best be described as what?
    11·2 answers
  • Mendel's law of______ governs which allele is expressed in an individual.​
    9·2 answers
  • (last question) #5<br> Describe the different body senses and how they function.
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!