All categories

3 years ago

Es

Biology

2 answers:

bearhunter [10]3 years ago

8 0

Answer:

The correct answer is "Transcription occurs only in prokaryotic cells in the cytosol white splicing occurs only in eukaryotic cell in the nucleus".

Explanation:

Prokaryotic cells and eukaryotic cells could be differentiated by the site at which transcription occurs (the synthesis of mRNA from a DNA template). In prokaryotic cells transcription occurs in the cytosol, while in eukaryotic cells transcription occurs in the nucleus. This is easy to remember since prokaryotic cells do not have a nucleus. Also, splicing occurs only in eukaryotic cells in the nucleus. Splicing is the removal of the non coding regions of mRNA (introns), which happens frequently in eukaryotic cells and in prokaryotic cells is a very rare event.

Vinil7 [7]3 years ago

4 0

Answer:

Transcription only occur in eukaryotic cells. Transcription and slicing both occur in the nucleus.

Explanation:

Transcription and splicing only occur in eukaryotic cells. Transcription and splicing both occur in the nucleus. Splicing of exons and intron removal is strictly a eukaryotic phenomenon. Prokaryotic genomes are smaller and do not contain introns. Both of these processes occur in the nucleus.

You might be interested in

How can a sex of an offspring be determined .Biology lab queston

jekas [21]

By looking at there chromosomes such as the x and y gametes

5 0

3 years ago

Which process is responsible for causing menstruation

Setler [38]

Explanation:

the process in a woman of discharging (through the vagina) blood and other materials from the lining of the uterus at about one monthly interval from puberty until menopause (ceasing of regular menstrual cycles).

4 0

3 years ago

Which technique cannot be used to analyze gene expression?

masha68 [24]

Answer:

So the mnemonic that I know is SNOW DROP. Southern=DNA, Northern=RNA, O=O, and Western=Protein. The question asks, "Which technique CANNOT be used to analyze gene expression?" and the answer is Southern because it is a "techniue used to detect a particular sequence in a sample of DNA."

8 0

3 years ago

Put these steps in the order in which they occur in light-dependent reactions. Electrons are transferred from photosystem II to

Tamiku [17]

Explanation:

Light energy is absorbed and transferred to the reaction center.
A water molecule is split.
Electrons are transferred from photosystem II to photosystem I.
ATP is synthesized from ADP and inorganic phosphate.

Further Explanation:

Photosynthesis is a chemical pathway that’s integral to producing energy in plants and other primary producers. Energy in the form of molecules of glucose is produced from light, water and carbon dioxide while oxygen is released. This occurs in several complex steps, photosynthesis is a rate limited reaction, depends on several factors including carbon dioxide concentration, ambient temperature and light intensity; the energy is retrieved from photons, I.e. particles of light, and water is used as a reducing agent. This occurs in the thykaloids, where pigment molecules like chlorophyll reside.

The chloroplast is a membrane bound organelle found in plants. It contains several invaginations of a plasma membrane called the thylakoid membrane. This contains chlorophyll pigments, in stacks called granum, while the internal spaces of the organelle are called the lumen. Liquid surrounds the granum, forming the stroma.

During the light reaction:

Light is absorbed by pigments in phosystem II (PSII). This energy is transferred among pigments til it gets to the reaction center, and is transferred to P680; this promotes an electron to a higher energy level where it then goes to an acceptor molecule.

Water supplies the chlorophyll in plant cell with replacement electrons for the ones removed from photosystem II. Additionally, water (H2O) split by light during photolysis into H+ and OH- acts as a source of oxygen along with functioning as a reducing agent.
the electron moves down an electron transport chain (ti PS I)where it experiences continuous energy loss. This energy fuels the pumping of H+ from the stroma to thykaloid, leading to the formation of a gradient. The H+ move along their gradient and cross through ATP synthase, into the the stroma.
ATP synthase converts ADP and Pi to the energy storage molecule ATP.
The electron gets to photosystem I where it goes to pigments at P700. It absorbs light energy, the electron is promoted to a higher energy level, and passed to an electron acceptor. This leaves a space for another electron which is then replaced by one from photosystem II.
in the ETC, the molecule NADP is reduced to NADPH by providing H+ ions. NADP and NADPH are integral to the Calvin cycle where monosaccharides or sugars like glucose are produced after the modification of several molecules.

Learn more about Photosynthesis at brainly.com/question/4216541

Learn more about cellular life at brainly.com/question/11259903

#LearnWithBrainly

5 0

3 years ago

What are the two major methods by which cells communicate to coordinate their functions?.

Anni [7]

Chemical messengers and the Electrical signals are the two main methods by which cells communicate with each other to coordinate their functions and metabolic activities.

According to biologist, A cell communicates through chemical messengers, by sending the chemical signals to other cells and also receive that signal from another cell. Similarly, Electrical signals or impulses also work in the same way.

Therefore, body contains many types of lipids which works as a chemical messengers also electical signal or impulses can easily travel throught these lipids. Cell uses these chemical messengers and electrical impulses to communicate with other cell. Although, In order to trigger a response, these signals are transmitted across the cell membrane of the cell.

Learn more about cell communication here

brainly.com/question/18223077

#SPJ4

7 0

1 year ago