methylation regulates transcription a. via the addition of a methyl group to cytosine bases of dna. b. via the addition of a methyl group to cytosine residues on rna polymerase ii. c. via the addition of a methyl group to cysteine residues on rna polymerase ii. d. via the addition of a methyl group to cysteine bases of dna.

The best option would be the letter B. At night, the stomata are closed so water in the leaves cannot evaporate, which reduces the need fro absorption of water at the root.

must be placed in the Plantae kingdom

chlorophylls, bacteriochlorophylls, accessory pigments, reaction-center pigments, and antennae pigments are all components of the photosystem that helps to capture radiant energy in plants and organisms such as bacteria.

Chlorophyll: In a plant, chlorophyll's function is to absorb light, often sunlight. Two types of energy-storing molecules receive the light energy that is absorbed.

Bacteriochlorophyll: Anoxygenic (don't produce O2) photosynthetic bacteria include bacteriochlorophylls, which absorb wavelengths that chlorophylls do not, enabling the bacteria to grow in environments where other photosynthetic organisms cannot.

Accessory pigments: absorbing wavelengths that the other pigments are unable to absorb, accessory pigments improve the efficiency of light capture.

Teaction center pigment: In the photosynthetic process, reaction-center pigments serve as electron donors.

Antennae pigments: A complex of pigments called the antennae serves as a funnel, collecting light energy, and transmitting it to a pigment called the response center.

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It would depend on whether the modified codon code for the same amino acid or not. If it does not code for the same amino acid, then the protein would be different, and in some cases, it can cause a problem with its function, mostly if this modification is found on the interaction site of the protein with other components.

The energetic cost of converting lactate back to glucose per molecule of glucose generated is 6 ATPs.

Lactate is produced by anaerobic respiration in muscles when oxygen demand exceeds supply, causing fatigue. The liver converts the lactate back to glucose, which muscles can utilize for further energy production. There are two main pathways that produce ATP in human cells: aerobic respiration (requiring oxygen) and anaerobic respiration (not requiring oxygen).

During anaerobic respiration, energy is obtained from glucose without the use of oxygen. As a result of anaerobic metabolism, red blood cells generate lactate. Red blood cells are the only mammalian cells that lack mitochondria and consequently depend solely on anaerobic metabolism for energy production. This reliance on anaerobic metabolism has significant consequences, with lactate being continually produced as a byproduct.

The liver is responsible for converting lactate back to glucose in a process known as gluconeogenesis. It is an ATP-intensive process that consumes 6 ATP molecules per molecule of glucose generated, according to research.

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Answer:

Botulism toxin disrupts motor control by blocking the release of acetylcholine by motor neurons.  

Explanation:

Acetylcholine is the principal neurotransmitter in motor neurons. If there is no release of acetylcholine from the presynaptic motor neuron, the ion channels will not open. If the ion channels do not open, Na+ cannot enter the postsynaptic membrane to start an action potential. As a result, the muscle can not move.

The ion channels have a specif receptor for acetylcholine. When acetylcholine binds to the receptors, the channels open. With the ion channels open, Na+ can enter the postsynaptic membrane to start an action potential. This does not happen in the presence of botulism toxin since it blocks the release of acetylcholine.

Answer:

smelling rotten eggs - covering your nose

touching a hot dish - pulling your hand away

jumping into a cold pool - shivering

Explanation:

A stimulus generally refers to a detectable change in the environment of an organism. These changes could be physical or chemical and could be in the internal or external environment of organisms.

Organisms react to changes in their internal or external environment by responding appropriately. Hence perceiving the smell of rotten egg, feeling the hotness of a dish by touching it, and feeling cold immediately one jumps into a cold pool are all examples of stimuli and their corresponding responses would be covering one's nose, pulling the hand away, and shivering of the body in order to counter the cold.

In other words:

smelling rotten eggs - covering your nose

touching a hot dish - pulling your hand away

jumping into a cold pool - shivering

Answer:

BECAUSE IT BECAUSE IT BECAUSE IT BECAUSE IT BECAUSE IT BECAUSE IT BECAUSE IT BECAUSE IT BECAUSE IT

Explanation:

BECAUSE IT BECAUSE IT BECAUSE IT BECAUSE IT BECAUSE IT BECAUSE IT BECAUSE IT BECAUSE IT BECAUSE IT BECAUSE IT BECAUSE IT BECAUSE IT BECAUSE IT BECAUSE IT

Answer: Chloroplast

Explanation:

Plants and some algae have chloroplasts responsible for photosynthesis. Plants undergo photosynthesis to transform light energy into chemical energy. This energy is stored in the form of sugar to support their growth and provide energy. Chloroplasts have a double membrane, with the thylakoid membrane located within the inner membrane.

Photosynthesis occurs within the thylakoid membrane, which is folded into sacs called thylakoids. Chlorophyll, a green pigment, is present in the thylakoids and it absorbs light energy to split water molecules into hydrogen and oxygen. The oxygen is released into the atmosphere while the hydrogen is used to create ATP, a molecule that stores energy. ATP and hydrogen are then utilized to make sugar, the final product of photosynthesis.

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If Mendel had performed experiments on cattle rather than on peas, the patterns of inheritance would not have been easily detectable, because cattle have small numbers of offspring. Option B is correct.

Inheritance is the transmission of genes from one generation to the next. The transmission of genetic material from parents to their offspring is known as inheritance. Inheritance is responsible for the genetic similarity between biological parents and their offspring. In sexually reproducing organisms, genes are passed on through gametes such as eggs and sperm. Inheritance may also refer to the distribution of an estate after someone's death.

The reason why Mendel could not have detected inheritance patterns in cattle is that they have a small number of offspring. Mendel chose to work with garden peas because they were available in a variety of easily distinguishable types and were self-fertilizing, making it possible to generate pure lines of pea plants with predictable traits.

Peas are small, easy to grow, and produce large numbers of offspring, all of which are essential characteristics for experiments on inheritance to be successful. Had Mendel selected cattle for his study of inheritance, it would have been difficult to detect inheritance patterns since cattle have small numbers of offspring. Mendel was able to observe patterns of inheritance because pea plants have many offspring and their traits were easy to distinguish from one another.

Hence, option B is correct.

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The buccinator muscle and superior pharyngeal constrictor muscle are attached to each other at the posterior pharyngeal wall. Together, these muscles work to aid in the process of swallowing.

The buccinator and superior pharyngeal constrictor muscles are not directly attached to each other, as they serve different functions and are located in different areas of the head and neck.

The buccinator muscle is found in the cheek and is a part of the facial muscles. It helps in moving food during chewing and assists in the act of blowing.
The buccinator muscle is a thin, flat muscle located in the cheek, while the superior pharyngeal constrictor muscle is one of the three pharyngeal muscles located in the pharynx.
The superior pharyngeal constrictor muscle is a pharyngeal muscle located in the neck. Its primary function is to help in the swallowing process by constricting the pharynx.

Although they are not directly attached, both muscles work together to facilitate the process of chewing and swallowing food.

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Answer:

Unit of measurement in metric system is metre (m)

Th appropriate ordering of the body system from least to most foundation in which they protect the body against infection is as follows.

 cell lymphatic tissue, lymph node, lymphatic system, option A is correct.

The body has levels of organisation that build on each other. Cells make up tissues, tissues make up organs, and organs make up organ systems. The function of an organ system depends on the integrated activity of its organs

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Answer:

Option C is correct ( Action potential)

Explanation:

a momentary reversal in electrical potential across a plasma membrane (as of a neuron or muscle fiber) that occurs when a cell has been activated by a stimulus.

Answer:

It's True

Explanation:

Hope it helps :)

The statement is true that recycling paper reduces water use.

Recycling paper can indeed reduce water use in several ways. Producing paper from recycled fibers typically requires less water. The recycling process involves breaking down the used paper into pulp and removing impurities, which requires less water-intensive steps than starting from scratch with raw materials. Thus, recycling paper reduces the overall water consumption during paper production.

By recycling paper instead of disposing of it in landfills, the amount of paper waste sent for landfilling is reduced. Consequently, the potential for leachate formation and its associated water pollution risks can be minimized.

Overall, recycling paper helps conserve water by reducing water consumption during paper production, minimizing the need for extensive bleaching, and mitigating water pollution associated with landfilling.

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Answer:

You would look for the virus in other places

Explanation:

Answer:

C) Promoter

Explanation:

Gene expression is the process of synthesizing RNA from a gene (transcription), and subsequently, proteins from mRNA (translation). In both prokaryotic and eukaryotic cells, gene expression is controlled at the transcriptional level, which is regulated by certain proteins called transcription factors. Transcription factors are proteins that regulate the synthesis of a protein from a gene.

Transcription factors regulate the progression of transcriptional process by binding to a regulatory region on the DNA sequence about to be transcribed called PROMOTER. The promoter region is a DNA sequence contained in the OPERON. This binding influences the binding of the transcription enzyme, RNA polymerase in order for transcription to start.

Answer:

I think the best option given the options above would be D) operator.

Answer:

A. ECOLOGICAL FOOTPRINT

Explanation:

hoped this helped :)

Answer: Q1. The primary function of the plasma membrane is to protect the cell from its surroundings. Composed of a phospholipid bilayer with embedded proteins, the plasma membrane is selectively permeable to ions and organic molecules and regulates the movement of substances in and out of cells.

Q2. The phospholipids in the cell membrane are arranged in two layers, called a phospholipid bilayer. Each phospholipid molecule has a head and two tails.

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Answer:

As Earth cooled, water in the atmosphere condensed

Explanation:

dues to high temps, water evaporated.

as the earth's surface cooled, water condensed and formed oceans

rocks hardened to form continents

Answer:

A

Explanation:

its an ecosystem; reaction between living things and their environment

When populations share the environment and interact with the other populations of different living species present in the same are, it is called an ecological community. Thus, the correct option is B.

An ecological community is defined as the group of species which are commonly found together in an area. Ecological communities may include animal or plant assemblages with the similar habitat requirements and contain species which may interact with each other or rely on the similar processes in their particular environment.

An example of ecological community is a forest community which comprises of all the trees, the plant community, birds, deer, squirrels, foxes, fungi, insects, and other local or seasonal species.

Therefore, the correct option is B.

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We are exposed to UV rays almost every day, which is a form of radiation that can mutate DNA and cause cancer. The body has several mechanisms for correcting DNA mistakes.

These mechanisms are referred to as DNA repair systems. The two most common types of DNA repair mechanisms are nucleotide excision repair and base excision repair. Nucleotide excision repair: This repair mechanism works by removing the damaged segment of the DNA strand and replacing it with a new one. The damaged segment is removed by a group of proteins called exonucleases. The DNA polymerase then adds nucleotides to the single-stranded gap left behind by the excision process. Base excision repair: Base excision repair corrects DNA mistakes by removing the damaged base and replacing it with a new one. Glycosylases are the enzymes responsible for removing the damaged base. AP endonuclease and DNA polymerase are the two enzymes that work together to replace the missing nucleotide.

In conclusion, DNA mistakes can be corrected by the body's DNA repair systems, which are responsible for identifying and repairing damaged DNA. Nucleotide excision repair and base excision repair are two of the most common DNA repair mechanisms.

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So

viruses are not considered as living

Answer:

Transverse

Explanation:

Transverse waves possess a vertical wave motion and a horizontal particle motion.

happy to help ya :)

Answer:

Scientists say it's caused by humans

Explanation:

It is entirely our fault

Answer:

cell a has half as much dna as cells b, c, and d in a mitotically active tissue (like the epidermis). cell a is most likely in G1

your answer is G1

Explanation:

Answer:

They Start to Sprout and bud

Answer:

They grow more and produce flowers or fruit.

Explanation:

I got it right on my quiz haha

Hope this helped/helps!!

Have a nice day alsooo!

Answer:

It is predominantly solid but in geological time it behaved as a viscous fluid.

Explanation:

Answer:

true (more info below)

Explanation:

a mantle is a layer of hot, solid material between Earth's crust and core.

hope this helped!