Both strands of the DNA double helix contain nitrogenous bases held together by hydrogen bonds. In DNA, the sequence of nitrogenous bases varies widely. What is the significance of the nitrogenous bases?

A. They determine the amino acids in the proteins synthesized.
B. They prevent mutations from occurring in the process of DNA replication
C. They help complete the sugar-phosphate backbone of DNA molecules.
D. The amount of adenine and cytosine determines the length of the gene on a DNA molecule.

Answers

Answer 1

Answer:

A

Explanation:

Essentially, in the process of protein synthesis, there is first transcription where mRNA is synthesized off of a DNA strand with complementary nitrogenous bases. After processing occurs (in basic terms the mRNA is literally processed) and the mRNA strand leaves the nucleus, it attaches to a large and small ribosomal subunit (a ribosome) where translation occurs. The gist of it is when the mRNA strand is being read by the ribosome. tRNA will come over and bind temporarily bringing with it a specific amino acid, starting the formation of the polypeptide/amino acid chain. Nitrogenous bases play into this as the sequence of the nitrogenous bases is what determines what tRNA will bind onto it which determines which amino acid is brought. More specifically, this deals with the codons of the mRNA and the corresponding anticodons with the tRNA, which is a bit of a more specific topic.

Answer 2

The nitrogenous bases help complete the sugar-phosphate backbone of DNA molecules. The correct option is C.

What is DNA?

DNA, also renowned as deoxyribonucleic acid, is a complex molecule that includes all of the information required to construct and retain a lifeform.

DNA is found in the cells of all living things. In real sense, as in almost every cell in a multicellular organism contains the entirety of the organism's DNA.

DNA is composed of chemical key components known as nucleotides. These building blocks are composed of three components: a phosphate group, a sugar group, and one of four different types of nitrogen bases.

Nucleotides are linked together in chains, with the phosphate and sugar groups alternating.

Thus, the correct option is C.

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Related Questions

why is it important to understand plant physiology in crop/plant production and productivity?in your discussion make sure that you mention related fields/areas in agriculture which specifically require a background of plant physiology ​

Answers

Knowledge of Seed physiology helps in understanding of different physiological and morphological changes that occur during germination.  By knowing the different inputs requirement of plants (water, nutrients, sunlight) we can easily manage the plant population to get highest yield.

compounds formed from the attraction of oppisitely charged ions are called ________.
A. covalent compounds
B. ionic compounds
C. mineral compounds
D. molecular compounds ​

Answers

Answer:

B. ionic compounds

Explanation:

helpppppppppppppppppppppppppp

Answers

Answer: B

Explanation:

As the temperature rises, the graph shows that the solubility increases

Emic and etic are referred to as

A. Homonyms

B. Types of material culture

C. Perspectives

D. Populations

Answers

Answer:

A

Explanation:

When substances are constantly moving
back and forth across a cell membrane, the
cell is said to be in a state of?

Answers

The diffusion of water molecules a secectlvely permeable membran.

The diffusion of water molecules a secectively permeable membrane.

What is Diffusion?

The net passive movement of molecules or particles from areas of higher concentration to areas of lower concentration is known as diffusion. There needs to be a concentration gradient for diffusion to happen.

The dissimilarity in the quantity of solutes, particles, or molecules between the two locations will drive them to travel between the two regions.

The gradient created by the uneven particle concentration between two fluids will cause the particles to move in order to balance the discrepancy in concentrations. However, solutes do not migrate in a single direction during the diffusion process.

Therefore, The diffusion of water molecules a selectively permeable membrane.

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Describe how a rainforest can reach a point when it cannot be restored by secondary ecological succession

Answers

Answer:Although the secondary forest will be low in diversity and poorly developed, the forest cover will be adequate for some species to return (assuming they still exist).  The solution must be based on what is feasible, not overly idealistic, and depends on developing a new conservation policy built on the principle of sustainable use and development of rainforests. Beyond the responsible development of rainforests, efforts to rehabilitate and restore degraded forest lands along with the establishment of protected areas are key to securing rainforests for the long-term benefits they can provide mankind.

Explanation:

i lloke dit up online because i have not did this yet

A very high damaged leads to no restoration of rainforest by secondary ecological succession.

A rainforest can reach a point when it cannot be restored by secondary ecological succession when the large portion of the rainforest is destroyed and most of diversity is vanished. At this time, restoration is impossible due to very high damages.

Ecological resilience is the ability of an ecosystem to be restored through secondary ecological succession after a severe disturbance. Rainforest have a high biodiversity that helps it to resist damage but at a certain limit so we can conclude that very high damaged leads to no restoration of rainforest by secondary ecological succession.

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List the following structures from largest to smallest: proton pump, nuclear pore, cyt c ribosome,
nucleus.

Answers

Answer:

Nucleus

Nuclear pore

Proton pump

Cyt C Ribosome

Explanation:

The nucleus of the cell is the largest of all of these structures, all of the others are located inside the nucleus of the cell or interact with it, the nuclear pore is a pore in the nucleus that allows the transport of proteins through the membrane, the proton pump passes through the nuclear pore, and a Ribosome is a protein that transports nutrients, so that would be the smallest.

The order from largest to smallest is nucleous>> >> ribosome >> nuclear pore >> proton pump >> Cyt C.

The nucleus is the organelle that contains the genetic material in a eukaryotic cell, whereas ribosomes are protein factories.

The nuclear pore is a  structure that allows the passage of certain molecules between the cytoplasm and the nucleus.

The proton pump is an integral protein-membrane, whereas Cyt C is a mitochondrial protein.

In conclusion, the order from largest to smallest is nucleous>> >> ribosome >> nuclear pore >> proton pump >> Cyt C.

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10. According to Bohr's model of the atom, electrons behave like....
A. Waves on a vibrating string
B.Planets orbiting the
C.sun light energy in a vacuum​

Answers

B.Planets orbiting hiiiiii

If the mass of Earth were increased by a factor of 8.00 , by how many times would the force between Earth and the Sun increase?

Answers

Answer:They would increased a lot and cause problems.

Explanation:

1. Which of the following does not absorb moisture readily ?
a.cotton
b.linen
c.viscose
d.acetate
e.nylon​

Answers

Cotton correct me if I’m wrong

Nylon does not absorb moisture readily.

What is nylon?Nylon is a synthetic fibre."It is made from reacting carbon-based chemicals found in coal and petroleum in a high-pressure, heated environment."It looks somewhat like silk.It is water repellent.

Hence, the correct option is e. nylon.

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What is the keystone species

Answers

Answer:

a species on which other species in an ecosystem largely depend, such that if it were removed the ecosystem would change drastically

Explanation:

Answer:a species on which other species in an ecosystem largely depend, such that if it were removed the ecosystem would change drastically.

Explanation:

The American Beaver (Castor canadensis) is one example of a keystone species in North America. In any arrangement or community, the “keystone” is considered one of the most vital parts. In a marine ecosystem, or any type of ecosystem, a keystone species is an organism that helps hold the system together.

section of DNA that provibes instuctions for specific traits

Answers

Answer:

Genes.

Explanation:

Genes are small sections of DNA within the genome that code for proteins. They contain the instructions for our individual characteristics – like eye and hair color. A gene is a small section of DNA that contains the instructions for a specific molecule, usually a protein

Genes are small sections of DNA within the genome that code for proteins. They contain the instructions for our individual characteristics – like eye and hair colour. A gene is a small section of DNA? that contains the instructions for a specific molecule, usually a protein. (I Hope this helps you :) )

Identify the "stomach" of the cell that breaks down waste and digests organelles that are not needed​

Answers

Answer:

Lysosomes

Explanation:

A lysosome is an organelle that contains enzymes that break down and digest unneeded cellular components, such as a damaged organelle.

Read each question carefully. Write your response in the space provided for each part of each question. Answers must be written out in paragraph form. Outlines, bulleted lists, or diagrams alone are not acceptable and will not be scored.
White blood cells called B cells produce proteins that can be used for the treatment of certain illnesses. However, these B cells do not live for very long on their own. To keep the B cells growing for a long time in laboratories, scientists fuse the B cells with cancer cells (fused B-cancer cells) that do grow for a very long time. The particular cancer cells used for the fusion are treated with chemicals that make them unable to produce the nitrogenous bases adenine and guanine, but the B cells with which they are fused do produce these nitrogenous bases. The scientists grow the large fused B-cancer cells in a growth medium that contains necessary nutrients for the cells and includes a source of carbon.
(a) Describe the role of carbon in biological systems.
(b) The membranes of both B cells and the cancer cells are largely composed of phospholipids. Explain how, when the membranes are fused, the polar parts of the phospholipids from one cell will interact with the phospholipids from the other cell and how the nonpolar parts of the phospholipids from one cell will interact with the phospholipids from the other cell.
(c) Make a claim about the most immediate effect on the fused B-cancer cells if the fused cells are transferred to a growth medium that lacks a source of nitrogen.
(d) Provide reasoning with evidence based on the composition of biological macromolecules to support your claim.

Answers

Answer: they can be ruduce

Explanation:

9C. The diagram below shows an enzyme-catalyzed reaction. How do
enzymes speed up biochemical reactions? *
Carbon dioxide
Water
Enzyme
Substrates
(carbonic
bind to
anhydrose
enzyme
-Active site
Carbonic
acid
Enzyme-
substrate
complex
Products
are released
Substrates
are converted
into products
They lower the activation energy of the reaction
They increase the number of available reactant particles
They absorb energy from the products
They provide energy to the reactants

Answers

Answer:

They lower the activation energy of the reaction

Explanation:

Enzymes are proteinous biochemical molecules that serve as catalyst in living systems. They speed up the rate of biochemical reactions by lowering the activation energy of the reaction they are involved in.

As this question describes, enzymes possess an active site, which the substrate binds to yield products. The enzymes make the reaction faster by reducing the activation energy of the reaction, which is the energy needed to start a reaction.

When a patient comes to a hospital with severe dehydration, doctors will give
them an IV filled with a salt-water solution called saline, which is isotonic with
the body's blood cells.
Why is the patient not given pure water?

Answers

Answer:

The red blood cells could burst.

Explanation:

If they are given pure water, the IV fluid will be hypotonic to the blood cells. That means water will end the red blood cells by osmosis, from a high concentration outside to a lower concentration inside.

This will result in the red blood cells becoming swollen and even potential  bursting.

how do mutations affect our communications?​

Answers

Explanation:

When a mutation alters a protein that plays a critical role in the body, it can disrupt normal development or cause a medical condition. A condition caused by mutations in one or more genes is called a genetic disorder. In some cases, gene mutations are so severe that they prevent an embryo from surviving until birth.Over time, a mutation might take place in one of the descendant cells, causing increased activity of a positive cell cycle regulator. The mutation might not cause cancer by itself either, but the offspring of this cell would divide even faster, creating a larger pool of cells in which a third mutation could take place.

True or false?
Density is equal to the mass of an object divided by its volume.

Answers

Answer:

True

Explanation:

The formula for density is

p = m/v

density = mass ÷ volume

Random mutations can occur in an organism's DNA, causing traits that are different from other organisms in that species. Sometimes these mutations can cause problems for the organism, but other times they are beneficial. What is a possible benefit to a random mutation in an organism?

Answers

Answer: It can increase an organism’s chances of surviving

Explanation:

-4. Which of the following correctly traces the path of air after it is inhaled?
A. epiglottis, trachea, bronchioles, alveoli
B. bronchioles, alveoli, epiglottis, trachea
C. epiglottis, bronchioles, alveoli, trachea
D. alveoli, epiglottis, trachea, bronchioles

Answers

The answer is c. Epiglottis, bro chilies, alveoli, trachea

Why does photosynthesis occur at the upper surface of the leaf than the lower surface

Answers

Answer: The sunlight hits the upper surface of the leaf, and sunlight is crucial to the photosynthesis process. The leaves trap the energy and use it to create glucose.

Does a parrot eat a grasshopper?

Answers

, A green Parrot eats insects and it will also eat a grasshopper . Green Parrot is Omnivorous in Nature.

I hope this helped

LIQUID DENSITY COLUMN
-Olive Oil
-Vegetable Oil
please help me with this question thanks:)

Answers

Answer: Vegetable oil

Vegetable oil is the ans

10. What changes during a chemical reaction between two compounds?
A. number of atoms
B. chemical bonds
C. total mass
D. total energy

Answers

Answer:

I think it's chemical bonds I'm not of that helped

The changes occurs in chemical bond during a chemical reaction between two compounds. The correct option is B.

What is chemical bond?

A chemical bond is a long-lasting point of attraction among atoms, ions, or molecules which then allows chemical compounds to form.

Ionic bonds are formed by the electrostatic force between oppositely charged ions, whereas covalent bonds are formed by the sharing of electrons.

A covalent bond is the strongest bond in chemistry. In such bonding, each atom shares electrons that bind them together.

The bonds that hold molecules together break apart and form new bonds during chemical reactions, rearranging atoms into different substances.

Each bond requires a different amount of energy to break or form; without this energy, the reaction cannot occur, and the reactants remain unchanged.

Thus, the correct option is B.

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Chrysanthemum pests and diseases include leaf miners, _____, powdery mildew and leaf spot

Answers

Answer:

aphids

Explanation:

it just is trust me

which kingdoms contain organisms that are multicellular You by bacteria archaea bacteria plant Amenia​

Answers

Answer:

(B and (C    

Animalia and Plantae

Explanation:

Got it right on edge (:

The kingdoms that contain organisms that are multicellular are Plantae, Animalia, and Fungi.

What are multicellular organisms?

Multicellular organisms are living beings that comprise cells, they represent the prevailing form of life, on our planet encompass a range of organisms such, as plants, animals, fungi and certain protists.

The emergence of organisms has bestowed benefits compared to their unicellular counterparts. Notably their ability to achieve sizes and intricate complexities sets them apart.

Moreover multicellular organisms possess the capability to differentiate their cells for functions. This adaptability enables them to thrive in environments and enhances their edge in securing vital resources.

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which ligament connects the shaft of the metatarsals

Answers

Answer:

plantar metatarsophalangeal ligament

Explanation:

The plantar metatarsophalangeal ligament attaches proximally from the head of the metatarsal to the base of the phalanx distally. The ligament extends plantarly from the medial tubercle to the lateral tubercle along the plantar surface of the joint.

The ligament that connects the shaft of the metatarsals is :

-Plantar metatarsophalangeal ligament

Metatarsals

The ligament that connects the shaft of the metatarsals is the plantar metatarsophalangeal ligament.

The plantar metatarsophalangeal tendon connects proximally from the head of the metatarsal to the base of the phalanx distally.

The tendon amplifies planarly from the average tubercle to the sidelong tubercle along the plantar surface of the joint.

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The majority of pesticides do not have a residual effect (i.e., not persistent; lose chemical activity) in the soil.

a) True

b) False

Answers

Answer:

B- False

Explanation:

Pesticides can contaminate soil, water, turf, and other vegetation. In addition to killing insects or weeds, pesticides can be toxic to a host of other organisms including birds, fish, beneficial insects, and non-target plants. Soil can be degraded and the community of organisms living in the soil can be damaged by the misuse or over use of pesticides. Some pesticides are more toxic to soil organisms than others.

Hope this helps!

which fungi has single cell​

Answers

Yeasts are known as single celled fungi. Around 1,500 species of fungi are recognised as yeasts.

When glucose is used as an energy source, the largest amount of ATP is generated by the ___________ of the entire respiratory process.

Answers

Answer:

electron transport chain

Explanation:

it generates the most

Chain is the correct answer
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