Answer:
Using single-lensed microscopes of his own design and make, Van Leeuwenhoek was the first to observe and to experiment with microbes, which he originally referred to as dierkens, diertgens or diertjes (Dutch for "small animals" [translated into English as animalcules, from Latin animalculum = "tiny animal"]).
Leeuwenhoek named the cells he observed originally as dierkens, which is the Dutch word for small animals, and translated to English as animalcules.
Hope it helps :)
Though I may be wrong :( ...
Have a great day!
Are RNAs processed before translation is able to occur in Prokaryotes? Do only mRNAs undergo processing and maturation in Eukaryotes?
Answer: RNAs are not processed before translation in prokaryotes, this process only takes place in eukaryotes.
Explanation:
Messenger RNA or mRNA is a single-straded ribonucleic acid that transfers the genetic information from the DNA (deoxyribonucleic acid) molecule of the cell nucleus to a ribosome (which are the machinery responsible for protein synthesis) in the cytoplasm. mRNA determines the order in which the amino acids of a protein will be joined and acts as a template or pattern for the synthesis of that protein. To accomplish this, the DNA molecule must be transcribed into an RNA molecule, which is used for protein synthesis.
The messenger RNA obtained after transcription is known as primary transcribed RNA or precursor RNA or pre-mRNA, which in most cases is not released from the transcription complex in a fully active form, but in eukaryotes it must undergo modifications before it can perform its function (RNA processing or maturation). These modifications include:
Elimination of fragments (splicing): In most cases, the mRNA undergoes the removal of internal, non-coding sequences called introns, and the connection of exons. This does not occur in prokaryotic cells, as they do not have introns in their DNA.Protection by CAP: Addition to the 5' end of the structure called "cap" or "capping", which is a modified guanine nucleotide, 7-methylguanosine triphosphate, via a 5'-5' triphosphate linkage, instead of the usual 3',5'-phosphodiester linkage. This cap is necessary for the normal RNA translation process and to maintain its stability. Polyadenylation signal: Addition to the 3' end of a poly-A tail, a long polyadenylate sequence, whose bases are all adenine. Its addition is mediated by a sequence or polyadenylation signal (AAAAAA), located 11-30 nucleotides upstream of the original 3' end. This tail protects the mRNA from degradation, and increases its half-life in the cytosol, so that more protein can be synthesized.The mature mRNA (in eukaryotes) is transferred to the cytosol of the cell through pores in the nuclear envelope. Once in the cytoplasm, ribosomes are coupled to the mRNA. However, in prokaryotes, ribosome binding occurs while the mRNA strand is being synthesized. After a certain amount of time, the mRNA is degraded into its component nucleotides by ribonucleases. So, the transcription and translation processes are carried out in a similar way as in eukaryotic cells but they occur simultaneously. But, the fundamental difference is that, in prokaryotes, the messenger RNA does not undergo a maturation process and, therefore, no cap or tail is added and no introns are removed. Moreover, it does not have to leave the nucleus as in eukaryotes, because in prokaryotic cells there is no defined nucleus.
So, RNAs are not processed before translation in prokaryotes, this process only takes place in eukaryotes.
which point or points on the image below show constructive interference of light?
a and b
a, c, and e
b and d
a and e
a
b, d, and c
Answer:
B and D
Explanation:
Which of the following of nondisjunction examples are right
Use the table to write the phenotypes that would be visible given the different genotypes.
I will mark Brainlist.
Answer:
EE. Large Eyes
oo. Round face shape
Ss. straight hair
CC.normal chin
Cc. normal chin shape
ee. Small eyes
ss. Curly hair
Oo. Oval face shape.
Which process(es) occur in body cells (such as skin, muscle, and bone)?
Group of answer choices
mitosis
meiosis
neither mitosis or meiosis
both mitosis and meiosis
Answer:
Mitosis
Explanation:
Mitosis is how somatic—or non-reproductive cells—divide. Somatic cells make up most of your body's tissues and organs, including skin, muscles, lungs, gut, and hair cells.
What is a reason for peer reriew?
A: to maintain scientific standards
B:to allow anyone to submit research
C:to ensure that science remains elitist
mrna used in a sentence
Answer:
The mRNA was positively corresponding with its simultaneous serum levels
Explanation:
Hope this helps!
Am I right? Please someone help me
Answer:
A. 17,100
Explanation:
The half life of carbon-14 is around 5,700 years. When the shell contains 50% of its original carbon-14, 5,700 years have passed. 25% means another 5,700 years have passed, meaning 11,400 years in total have passed. 12.5% means another 5,700 years have passed, meaning 17,100 years have passed in total.
if you had $5000 what would you do with it and why?
Answer:
pay off student loans
Explanation:
Answer:
I know some people are against this but I would get myself some hunting gear, put some money away for further things, get my favorite snacks, save for Christmas, and then I would put the rest towards my family's medical needs because my family means the world to me.
While all zebras have stripes, no two zebras share the same stripe pattern. adap
you have to addd more
Explanation:
you have to add more to your question, its is hard to answer
When comparing today's animals to the ones from the Mesozoic era, which is true?
A. only a few of the animals from the Mesozic era are
extinct
B. most of the animals from the Mesozoic era are extinct
C. dinosaurs still roam the Earth
D. all of the animals are still the same
i nned help with these
which 5 kingdoms that do have cell walls?
Answer: There are six kingdoms: Archaebacteria, Eubacteria, Protista, Fungi, Plantae and Animalia. Organisms are placed in a specific kingdom based upon a variety of factors, including cell wall structure. As the outermost layer of some cells, the cell wall helps maintain cellular shape and chemical equilibrium.
In this assignment, you will use simulations to analyze how climate, resources, and habitat size affect
carrying capacity. You will then look at another simulation to analyze the effects of certain factors that
affect biodiversity and populations. Finally, you will write and revise a conclusion on how human activity
affects biodiversity
Answer:
Directly affects.
Explanation:
Climate, resources, and habitat size directly affect carrying capacity of an ecosystem. Favourable climatic and environmental conditions increases the population of organisms to its maximum limit. More resources leads to increase in population of species in an ecosystem until carrying capacity. Habitat size also depends on carrying capacity which means higher carrying capacity can leads to bigger habitat size. Climatic change, Habitat destruction, introduced and invasive species and genetic pollution are factors that effect both biodiversity and population. Human activities causes pollution, destruction of habitat by cutting trees etc affects biodiversity.
PLZ ANSWER!!!!!!!! PLZ ANSWER
PLEASE HELPP (it's due at 11:59, i would like it done now)
here are the links to the articles if the ones on the pdf doesn't work
https://www.reuters.com/investigates/special-report/usa-lead-testing/ https://www.epa.gov/environmentaljustice
https://www.tedmed.com/talks/show?id=627338
Ive put this question here twice, i really need help, plz dont answer if youre not gonna help
Help me please finish the hypothesis! Only have 2 minutes No websites
HYPOTHESIS: If 2 chambers of water are poured side-by-side, the warmer water will mix the cooler layer because it
Answer:
The warmer water will mix with the cold water because it will migrate to the surface.
Explanation:
If hot water and cold water are poured in the same place, it means that they will occupy the same space. However, hot water has a lower density than cold water, which means that hot water molecules are lighter and will tend to rise towards the surface.
However, when migrating to the surface, the hot water molecules will pass between the cold water molecules, causing the two waters to mix. In this process, the hot water will transfer heat to the cold water and cool until the two waters have the same temperature.
14 Pierre is studying the organs in the human digestive system. He looks at a
diagram of the
intestines, similar to the one that follows.
Which of the following correctly describes the diagram?
A Structure A is the small intestine, and structure B connects the mouth to the
stomach.
B Structure A is the small intestine, and structure B absorbs water from
digested material.
aliq
C Structure A is the large intestine, and structure B absorbs nutrients from
digested material.
D Structure A is the large intestine, and structure B produces bile and stores its
temporarily.
05
10 points each answer and brainliest
(picture shown)
The diagram below shows four positions of Earth around the sun.
In which of these positions will the Earth move the fastest?
Position A
Position B
Position C
Position D
Answer:
b-a
Explanation:
.because the sun is pulling the earth but i..d...k what position u would answer with that hope that helps :p
When a scientist uses radiometric dating to determine the age of a rock specimen, would he use a radioactive element with a short half life, say a half-life of less than 10,000 years, or a radioactive element with a long half-life, say a half-life greater than 1 billion years?
Answer:
He will use a radioactive element with a long half life of greater than 1 billion years
Explanation:
Rocks are an aggregation of solid mass which is usually rich in minerals. The age of rocks is established using radiometric dating method.
According to Oxford Dictionary, radiometric dating is "a method of dating geological specimens by determining the relative proportions of particular radioactive isotopes present in a sample."
The age of rocks can only be ascertained using isotopes that have very long half lives because many of these rocks are very old (aged billions of years) hence their age can only be determined using elements that has a half life greater than 1 billion years.
Is RNA made in the nucleus or
cytoplasm? Explain how you know.
Answer:
They're non-coding RNAs that help the messenger RNAs to undergo the protein translation process. These RNAs, like the other messenger RNAs, are made in the nucleus, but ribosomal RNAs are made in the nucleolus which is a very specific part of the cell nucleus.
Explanation:
Answer:
RNA is synthesized in the nucleus and then exported to the cytoplasm.
Explanation:
Ribonucleic acid is a polymeric molecule essential in various biological roles in coding, decoding, regulation and expression of genes. RNA and deoxyribonucleic acid are nucleic acids
3) What are the “happy” neurotransmitters our gut biome can make:
a) Serotonin and dopamine
b) Cortisol and epinephrine
c) Serotonin and cortisol
d) Epinephrine and dopamine
Before mitosis begins, which happens before the nucleus starts diving?
A. The cytoplasm separates.
B. The DNA replicates.
C. The sister chromatids separate.
D. The homologous chromosomes cross over.
Answer:
B. The DNA replicates.
Explanation:
Activity in the chromosomes must occur before the beginning of mitosis. The cells will enter the S1 phase in preparation to divide.
Answer:
B should be your answer
Explanation:
Green anoles were forced out of their established habitat of trees, plants, walls and fences by invasive brown anoles. The green anoles then had to find new habitats in wetlands and tree crowns. This example illustrates the concepts of:
Answer:
both competition and realized niche
Explanation:
pls help! Diploid: somatic cell :: Haploid:
Which of the following organisms would be found nearest to the top level of a food pyramid?
A.Cougar
B. Antelope
C.Plankton
D.Redwood tree
Like in this picture, Does tropical zone have a high temperature?
Poll results show that 90% of scientists believe global warming is happening, so it is best to say that
A) a majority of scientists do not support the theory of global warming
B) global warming is alarmist propaganda
C) global warming is happening
D) a minority of scientists doubt global warming is occurring
E) global warming is a creation of scientists
Answer:
I think it's C
Explanation:
I hope this helps ^^
In the last 100 years, which of the following have added excess carbon dioxide to the atmosphere?
1) power plants
2) machinery
3) cars
4) ALL OF THE ABOVE
pls answer asap, would be very appreciative:)
Answer:
d
Explanation:
After the mRNA is formed, what happens?
A. It binds permanently with DNA molecule.
B. It moves out of the nucleus and into the cytoplasm.
C. It disassembles and the process repeats.
Answer:
The correct answer is - B. It moves out of the nucleus and into the cytoplasm.
Explanation:
mRNA formation is known as transcription which is the first process of protein synthesis in which mRNA is formed from DNA sequence with help of RNA polymerase enzyme.
After forming the mRNA sequence this mRNA moves out of the nucleus and reaches the cytoplasm where it performs the second process called translation with help of tRNA and ribosome to produce an amino acid chain.
Answer:
B. It moves out of the nucleus and into the cytoplasm.
Explanation:
After the mRNA is formed, it moves out of the nucleus and into the cytoplasm.