3. The two strands of a DNA molecule are held together by...
A. Ionic bonds
B. Hydrogen bonds
C. Peptide bonds
D. Covalent bonds

Answers

Answer 1
the answer is B. Hydrogen Bonds

Related Questions

why might it be important to know a person's lung capacity?

Answers

Answer:

Explanation:

I would talk about how lung can help dictate someones physical condition, and the shape that  their lungs are in. (dictate VO2 max, etc.) it can also tell yo u whether someone is severely out of shape, a smoker, in very good shape, a runner, etc.

are chemicals that are know to cause canser

Answers

Answer:

microwave

Explanation:

Answer:

microvave

Explanation:

What are some Characteristics of a ladybug after metamorphosis

Answers

Answer:

Ladybug physical characteristics

The ladybug has an oval-shaped body, six legs, two antennae, a head with two eyes, a thorax that is called a pronotum, and an abdomen (the part of the body that is covered by the elytra). When the pupa hatches as a new adult ladybug, it doesn't have any spots yet and its elytra are wet, soft, and pale colored.

Answer:

.

Explanation:

The ladybug has an oval shaped body, six legs, two antennae, a head with two eyes, a thorax that is called a pronotum, and an abdomen, the part of the body that is covered by the elytra. When the pupa hatches as a new adult ladybug, it doesn't have spots yet and its elytra are wet, soft, and pale colored.

Which sequence correctly indicates the branching pattern of the human respiratory system?
A) trachea bronchi bronchioles alveoli
B) trachea bronchioles bronchi alveoli
C) alveoli trachea bronchioles bronchi
D) alveoli bronchioles trachea bronchi

Answers

Answer:

A

Explanation:

The system including tissues and organs needed for breathing and exchanging gases is called the respiratory system. It is essential for providing fresh air and eliminating the waste air from the body.

The branching pattern of the human respiratory system includes option A) trachea bronchi bronchioles and alveoli.

The Respiratory system can be explained as:

The respiratory system includes the major organ lungs which along with some other tissues makes up the whole system.

The trachea gets diverged into two branches named bronchi which further splits into lungs called bronchioles.

The bronchioles spread throughout the lungs and have a sac-like small structure on its end called alveoli where the exchange of gases takes place.

Therefore, option A is the correct sequence of respiratory branching.

Learn more about the respiratory system here:

https://brainly.com/question/1621897

Pepsin is an enzyme produced in the stomach. Pepsin has an optimum pH that is very acidic, between a pH of 1.0 and 2.0. In an
experiment involving the enzyme pepsin, the pH is raised from 2 to 11. What will be the MOST LIKELY effect of this on the reaction?

Answers

Explanation:

the pepsin enzyme will not be able to work in a basic medium when ph raised from 2 to 11 it's efficiency will be affected and will not be in a condition of digesting protein .

plz mark my answer as brainlist plzzzz.

hope this will be helpful to you .

When the pH is raised from 2 to 11 the most likely effect on the reaction is ;  

The rate of reaction will decrease/delayed

Given that Pepsin enzyme has an optimum pH of 1.0 to 2.0, it will perform efficiently as a catalyst in an experiment whose pH levels fall within the range of the optimum pH of Pepsin.

Pepsin enzyme accelerates the digestion of proteins therefore when the pH levels are raised above 2.0 the efficiency of Pepsin enzyme will be negatively affected and the digestion of protein will require a higher activation energy.

Hence we can conclude that When the pH is raised from 2 to 11 the most likely effect on the reaction is The rate of reaction will decrease/delayed.

Learn more : https://brainly.com/question/24420086

In a cross Bb x Bb (B = Blue petals and b = pink petals), how many offspring will have the genotype Bb?

Answers

Answer:

2 offspring will have the genotype Bb.  

Explanation:

Crossing the genotypes Bb and Bb results in 2, or 50% of the offspring having the genotype Bb.  In the top right box, the B on the top and the B on the side make the BB genotype.  In the top left box, B and b make the first Bb genotype.  The lower right box crosses B and b to make the second Bb genotype.  The last box in the bottom right crosses b and b, resulting in the genotype bb.  So, after crossing the genotypes written on the top and side of the punnet square, 2 of the offspring will have the Bb genotype.  (I got this by combining the letters outside the punnet square in the box where the row and column meet) .

The four tenants of evolution by natural selection

Answers

Answer:

variation, inheritance, selection and time

Explanation:

I NEED HELP PLEASE

will mark brainliest

Answers

Answer:

As one goes up the other does as well for the first 2 but they aren't proportional (it is not simple cause and effect as there is a lot of factors)

The last question is to decrease their emissions as rising temperature is being effected by rising CO2 levels and rising temperature can cause a feedback loop causing more rising temperature

Explanation:

On the Galápagos Islands, Darwin observed tortoises with domed and saddle-shaped shells. How did Darwin’s observations of these tortoises help him form the theory of evolution by natural selection?

Answers

Helped to confirm that environmental changes cannot affect the characteristics of a species.

Which of the following is most likely responsible for the fact that organic molecules no longer formed spontaneously on Earth?
A. The amount of UV radiation increased
B. The amount of oxygen in the atmosphere increased
C. Water accumulated in the oceans
D. Earth's surface temperature warmed

Answers

The answer is B. The amount of oxygen in the atmosphere increased.

Answer:

b

Explanation:

oxygen in air

and atmosphere

Help thank you please

Answers

Answer:

It's C

Explanation:

The correct answer is C

What poisonous chemical is used to separate the gold from the waste material?|

Answers

sodium cyanide solution

hope that helps

how does parasitism differ from other symbiotic relationships?? (please help of you know it )​

Answers

Answer:

Symbiosis is when one creature benefits while the other is unaffected. Parasitism is when one creature benefits while the other is harmed.

Explanation:

Think of parasites. They feed off of other creatures and harm them in the process. Symbiosis is similar, but neither creature is harmed.

Explain how DNA results in the expression of a gene using the following words: DNA, mRNA, tRNA, gene, transcription, and translation

Answers

Explanation:

in order for a gene to even be transcribed, it must be "turned on" or "expressed" meaning the nucleotides have moved away from each other. after it's expressed, the gene will unwrap and continue on with transcription, and make mRNA copy of a DNA strand. once RNA is made it will leave nucleus and enter cytoplasm to find a ribosome. once it attaches to ribosome, translation begins, and a tRNA will bind to anti-codon, and the building of a polypeptide/protein will begin.

Name two types of pathways that help a body maintain homeostasis, and an example of each.

Answers

Answer:

Explanation:

The cardiovascular and lymphatic systems transport fluids throughout the body and help sense both solute and water levels and regulate pressure. If the water level gets too high, the urinary system produces more dilute urine (urine with a higher water content) to help eliminate the excess water.

Answer:

The receptor and afferent pathway are pathways that help the body stay n homeostasis. An example of the receptor is like temperatures in your skin. An example of Afferent pathways are sensory neutrons.

Explanation:

Add a brown eyes cross in the Punnett Square below for practice: Mother genotype (Bb) in the top squares, father genotype (Bb) in left side squares. B B. I b​

Answers

Answer:

My answer is the genotypes are BB, Bb, Bb, and bb.

Explanation:

I attached a photo of the punnet square after crossing the genotypes Bb and Bb.  Crossing the B on top with the B on the side results in the genotype BB.  Crossing the b on top with the B on the side results in Bb.  The genotype that results is written in the box that connects the row and the column (such as top row and left column results in BB).  

where does the energy for active transport come from ​

Answers

Answer:

Active transport is a process that is required to move molecules against a concentration gradient. The process requires energy. Energy for the process is acquired from the breakdown of glucose using oxygen in aerobic respiration. ATP is produced during respiration and releases the energy for active transport.

I hope it's helpful!

each codon codes for an

Answers

Answer:

An amino acid.

Explanation:

Each codon applies to an individual amino acid.

Answer:

Each codon corresponds to a single amino acid (or stop signal), and the full set of codons is called the genetic code. The genetic code includes 64 possible permutations, or combinations, of three-letter nucleotide sequences that can be made from the four nucleotides.

Explanation:

All existing matter and space is referred to as the _______________

Answers

Answer:

The universe is the answer

Answer:

The cosmos?

Explanation:

An atom has 10 protons, 11 neutrons, and 9 electrons. What is the charge of this atom?
A) 0 or neutral
B) +1
C) -1
D) -2

Answers

A maybe? I really don’t know

Answer:

A

Explanation:

32 POINTS!!

help a sister out plz

Phosphorus (P) is the element with the atomic number 15. Which of the
following correctly compares 31 and 32p, which are two isotopes of
phosphorus?

A. Both isotopes contain 15 protons.
B. 31P has 30 protons, whereas 32P has 31 protons.
c. 31P has 31 neutrons, whereas 32p has 32 neutrons.
D. Both isotopes contain 17 neutrons.

Answers

Answer: A both isotopes contain 15 protons.

Explanation:

Can someone plzzz help!!

Answers

Answer:

Explanation:

1 (Can have a DNA genome) both

2 (Not made of cells) virus

3 (Protein coat instead of membrane) virus

4 living organisms

5 both

6 living organisms

what kind of cell has many orgins of replication

Answers

Answer:

Assembled replisomes bidirectionally replicate DNA to yield two copies of the bacterial chromosome. B) Linear eukaryotic chromosomes contain many replication origins. I

Answer:

eukaryotic chromosomes

Explanation:

Prokaryotic chromosomes have a single source of replication whereas numerous sources of eukaryotic chromosomes. Since eukaryotic chromosomes are much larger, many outlets are required for the whole chromosome to be repeated within a limited period of time.

A replication root is a segment of DNA in which a gene, plasmid or virus is repeated.

Margaret has detached earlobes (a) , which is a recessive trait. If she wanted ALL of her children to have attached ears (A), what type of man would she need to marry in order to give her the best chances?

A. A man with the genotype AA

B. A man with the genotype aa

C. A man with lobed ears like hers

D. A man with the genotype Aa

Answers

I think the answer is A. My dude.

Margaret can have all her children with attached earlobes only if she marry a man with AA dominant genotype.

As given,

Margaret has detached earlobes (a) which is a recessive trait  If she wanted all of her children to have attached ears (A) if she have to marry a man with the dominant trait

Punnett' square:

                                    A           A

                        a       Aa         Aa  

                          a       Aa         Aa

[Aa] are the genotype with attached earlobes [dominant genotype]

Therefore, Margaret can have all her children with attached earlobes only if she marry a man with AA dominant genotype.

To know more about dominant and recessive trait.

https://brainly.com/question/20730322

Explain how waves eventually even out a shortline?​

Answers

Answer:

They expend all their energy overtime

Explanation:

A tall pea plant with red flowers has the genotype TtRr. This plant is crossed with another tall pea plant with white flowers, having the genotype Ttrr. What is the probability of getting dwarf plants with red flowers in the F1 progeny

Answers

Answer:

1/8 or 12.5%

Explanation:

This question involves two genes coding for height and flower color in pea plant. The alleles for tallness (T) and red flowers (R) are dominant over the alleles of short (t) and white flowers (r).

According to this question, a tall pea plant with red flowers (TtRr) is crossed with another tall pea plant with white flowers (Ttrr). The following gametes is produced by each parent:

TtRr - TR, Tr, tR and tr

Ttrr - Tr, Tr, tr and TR

Using these gametes in a punnet square (see attached image), the following proportion of F1 offsprings will be produced as follows:

Tall, Red (T_R_) = 6

Tall, white (T_rr) = 6

Dwarf, red (ttR_) = 2

Dwarf, white (ttrr) = 2

The probability of getting dwarf plants with red flowers in the F1 progeny is 1/8 or 12.5%.

Answer:

12.5

Explanation:

got it correct on test

This serves as a quick energy source.
a. carbohydrate.
b. nucleic acid
c. lipid.
d. protein.

Answers

A. Carbohydrates.

Carbohydrates are stored as fat.

first to get it right gets brainiest
you are in a one story house everything is blue what color are the stairs

Answers

theres no stairs it’s a one story house

If the house is one story then there are no stairs unless there is either a an basement     or     b an attic

Calico cats are almost always female because the gene for coat color is
carried on the X chromosome. The Y chromosome in cats has no color
gene. Explain how a calico cat might be a male. *

Answers

Answer:In rare cases, a male cat can inherit two X chromosomes in addition to his Y chromosome (Klinefelter Syndrome). ... If the two X chromosomes do not carry the same allele (i.e., the cat's genotype is XBXbY), then the male will express calico coloration, just as a female would.

what is the relationship between the cell membrane and cystic fibrosis?

Answers

Answer:

The CFTR gene provides instructions for making a protein called the cystic fibrosis transmembrane conductance regulator. This protein functions as a channel across the membrane of cells that produce mucus, sweat, saliva, tears, and digestive enzymes.

HOPE THIS HELPS

Other Questions
Question 3 of 12Improvise l'im-pre- viz\ verb 1. To put together with little preparation orplanning. 2. To make, invent, or arrange offhand. French improviser, fromItalian improvvisare, from Latin improvisus unforeseen.Which part of the dictionary entry refers to the pronunciation of the wordimprovise?O A. verbB. To put together with little preparation or planning,c. from Latin improvisus unforeseen,O D. \'im-pre- viziNo Before retiring in the fall of 1952, Button also won his fifth world championship title. Is this a: simple, compound, complex, or compound-complex sentence Evaluate using the given values.a=1 b=2 c=3 x= -3 y= -2 z= -11.)2a+b/2 -c/b2.)4x+3y3.)5ab4.)7y+2b5.)7+a6.)2b/4y7.)3c-5z^28.)xyz9.)ab/y^210.)6/abc In the right triangle ABC, CD is an altitude, and c=e+f,by combining three equations it can be shown that a^2+b^2=c^2.One of the equations is c=e+f.which of the following could be the other two equations Write an equation of the line that passes through the given points. (3, 5), (0, 1) what is 3/4 as a fraction out of 100, a decimal,and a percentage On January 1, 2020, Scottsdale Company issued its 11% bonds in the face amount of $3,000,000, which mature on January 1, 2030. The bonds were issued for $$3,385,058 to yield 9%. Scottsdale uses the effective-interest method of amortizing bond premium. Interest is payable annually on December 31. The 12/31/23 Premium on Bond Payable balance is: What texture is being used below? Descriptive or Sequence?During the first two months of his captivity, Cinque was disturbed to find that he had begun to forget little things about Africa_ the smell of freshly harvested rice, the color of the sunsets, the feel of wet grass beneath your feet Which numbers have an absolute value of 4?(you can pick more than one)4-428 A scientist has two solutions, which she has labeled Solution A and Solution B. Each contains salt. She knows that Solution A is 55% salt and Solution B is 80%salt. She wants to obtain 30 ounces of a mixture that is 65% salt. How many ounces of each solution should she use? Also known as a yeast infection or thrush, an infection that occurs on the skin or mucousmembranes in warm, moist areas such as the vagina or mouth and is caused by apathogenic yeast is called what in medical terminology What feature did World War I, World War II, and the Cold War have in common? (7,8) and (x,-5) with a slope of -3/4 I have to find the value of X A snail moves 3/8 of a foot in 1/5of an hour. What is the snail's speed in feet per hour?A) 3/40 feet per hourB) 1 5/8 feet per hourC) 1 7/8 feet per hourD) 2 7 /8 feet per hour Which graph is the solution to the following inequality The answers..............................plz and thx background info-A rabbit started at point 0 and made 3 jumps: a jump of 4 units, then a jump of 2 units, and then a jump of 1 unit. We do not know the direction of either jump. Where on the number line can this rabbit be now? The answer to this is -7, - 5, - 3, - 1, 1, 3, 5, and 7Actual question-Next time, the rabbit from the previous problem started at 10. Where on the number line can he be after the same three jumps? Use the diagram to the right to solve for y.A y = 13By = 15C. y = 7.5Dy = 20 Find the number of solutions of the equation 9h^2 - 12h + 4 = 0 by using the discriminant. The poster that lists the classroom rules in Mrs. Akins classroom has a length of 2/3 yard and a width of 3/4 yard.