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
N76 [4]
3 years ago
7

DNA sequences can act as "tape measures of evolution". Scientists analyzing the human genome sequence were surprised to find tha

t some of the regions of the human genome that are most highly conserved (similar to comparable regions in other species) don't code for proteins. What is a possible explanation for this observation? EVOLUTION CONNECTION sequences can act as "tape measures of evolution". Scientists analyzing the human genome sequence were surprised to find that some of the regions of the human genome that are most highly conserved (similar to comparable regions in other species) don't code for proteins. What is a possible explanation for this observation?
Biology
1 answer:
jenyasd209 [6]3 years ago
7 0

Answer:

Non-coding DNA regions play important roles in regulating transcriptional activity by encoding different types of non-coding RNAs (ncRNAs), acting as scaffold attachment regions, acting as enhancer specific regions, etc.

Explanation:

Historically, it had been believed that non-coding DNA sequences were 'junk DNA' since they don't encode for proteins (beyond the sequences that are transcribed into functional non-coding RNAs, i.e., transfer RNA and ribosomal RNA). However, in the last years, it has been shown that non-coding DNA sequences play critical roles in regulating gene expression and genome function. For example, evolutionary conserved non-coding RNAs (ncRNAs) with regulatory roles on gene expression such as, for example, long non-coding RNAs (lncRNAs) and microRNAs (miRNAs) have been mapped in non-coding DNA sequences, thereby evidencing the functional significance of these regions. In consequence, the conservative nature of certain non-coding DNA sequences evidence that mutations in such regions may have significant deleterious effects, and thereby they could have a negative impact on the fitness of the individual.

You might be interested in
Please please help need help bad
Galina-37 [17]

Answer:

Information about flowers

Explanation:

1. A flower, sometimes known as a bloom or blossom, is the reproductive structure found in flowering plants. The biological function of a flower is to affect reproduction, usually providing a mechanism for the union of sperm with eggs.

2. Information about stamen and pollen: The stamen is a male reproductive organ of a flower. It produces the pollen. The stamen has two parts: anther and stalk. After successful pollination, the pollen grain (immature microgametophyte) completes it's development by growing a pollen tube and the two male gametes move through the pollen tube to the ovule.

sorry if it's too long. hope this helps!!

7 0
3 years ago
16. The goals of biodiversity conservation include all of the following EXCEPT (1 point) protecting individual species. introduc
ludmilkaskok [199]
The best answer is: introducing exotic species into <span> new environments. This can be actually bad, as new species can actually reduce the biodiversity in the environments to which they're introduced</span> , such when cats hunt indigenous birds.

I was a bit thinking about the last option too: making sure local people benefit from conservation efforts. This is not one of the classical goals of the conservation efforts, but since the previous one is definitely correct, i don't this one is. (it's not that it's not a goal, but it isn't a main focus)
4 0
3 years ago
Read 2 more answers
Some homeostatic imbalances cause a variable that is normally controlled by negative feedback to be abnormally controlled by pos
tigry1 [53]

Answer:

True

Explanation:

Some deviations from normal homeostasis activate the positive feedback loops to control the conditions which are otherwise regulated by negative feedback mechanisms.

For example, the blood levels of respiratory gases and H+ ions are regulated by a negative feedback system via chemoreceptors. The increased partial pressure of carbon dioxide gas and lowered pH or lowered partial pressure of oxygen in the blood are sense by central and peripheral chemoreceptors which in turn activate the neurons of the dorsal respiratory group (DRG).

The activated DRG triggers an increased in the rate and depth of the breathing to facilitate the inhalation of more oxygen and exhalation of CO2 to restore the normal levels.  

However, hypocapnia inactivates the chemoreceptors and does not allow negative feedback to restore the normal CO2 levels in the blood.  

Under such conditions, the positive feedback loop stimulates the DRG neurons more strongly in response to the increased partial pressure of CO2 above the normal levels than when the partial pressure of oxygen falls below the normal level. These dangerously lowered oxygen levels may also cause fainting.  

5 0
3 years ago
What is the function of DNA in a cell?
Ugo [173]
The answer is the last one
- carrying genetic material
7 0
3 years ago
Protein synthesis consumes four high-energy phosphate bonds per added amino acid. Transcription consumes two high energy phospha
SVEN [57.7K]

Answer:

30 protein molecules per mRNA molecule

Explanation:

In this problem, it is necessary to have into account that the transcriptional process requires six (6) phosphate bonds to synthesize one (1) codon (i.e, each three nucleotides), and also discards 95% more energy to make mRNA, it means 19 times this amount of energy >> 6 x 19 = 114 bonds. In consequence, transcription requires 120 phosphate bonds (6 + 114 = 120), while translation requires four (4) phosphate bonds per codon. From this deduction, it is possible to find the number of protein molecules synthesized with regard to the energy cost of the translation process and the transcriptional process >>> 120 bonds (transcription) /4 bonds (translation) = 30 protein molecules.

7 0
3 years ago
Other questions:
  • I NEED THIS ASAP PLEASE HELP ME!!! Part E
    5·2 answers
  • TRUE OR FALSE:
    6·2 answers
  • Which is required for the light-independent reactions in photosynthesis to occur?
    9·1 answer
  • Your teacher has given you a sample of soil to examine. Would you use a dry mount or a wet mount to examine it? Explain your rea
    11·2 answers
  • does mold produce a toxin to kill bacteria? Or does mold prevent the growth of bacteria on a petri dish?
    8·1 answer
  • Why do some cells divide faster than others and some cells do not divide after they are formed? Into which group does cancer fit
    13·1 answer
  • What does each letter in the acronym F.O.I.L. stand for?<br> F<br> O<br> I<br> L
    7·2 answers
  • PLS HELP.
    12·1 answer
  • Which type of soil would be LEAST likely to support the growth of a rose bush?
    15·2 answers
  • Which eye structure is primarily responsible for making the adjustments required to focus on objects both near and far?.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!