1. How many kinds of nitrogen bases does a DNA molecule have?
A. 2
B. 3
C. 4.
D. 1

Answers

Answer 1

Answer:

4.

Explanation:

Adenine, Thymine, Cytosine, and Guanine

(In RNA Thymine is replaced with Uracil)


Related Questions

Are any change in the sequence of bases in DNA or RNA that can cause by mutagen or can happen spontaneously in the cell

Answers

Answer:

MUTATION

Explanation:

Mutation is a change or alteration in the genetic sequence of a DNA or RNA (nucleic acid) that are induced by a chemical substance called MUTAGEN or by a spontaneous occurrence. Mutation are of different types depending on how it occurs in the cell. A mutation can be deletion (removal), substitution (replacement), insertion (addition) etc.

Based on this question that states that "any change in the sequence of bases in DNA or RNA that can be caused by mutagen or can happen spontaneously in the cell", the process of MUTATION is being described.

Miguel y Andrés empujan dos cajas del mismo material y de diferente peso, aplicándoles la misma fuerza, como se muestra en la siguiente figura: Si Miguel y Andrés empiezan a empujar sus cajas al mismo tiempo, ¿cuál de los dos cruzará primeroel banderín?

Answers

Answer:

Cualquiera sea más ligero porque será más fácil de empujar. Dando como resultado la caja para superar la línea de meta más rápido

Explanation:

thinks mrs. Clack that finned tetrapods developed "hands" before or after migrating to land​

Answers

Big fat juicy titsdood

Answer:

what am i supposed to anwser? should I prove her wrong?

Explanation:

2. Which atom in the water molecule is negatively charged?

Answers

Answer:

oxygen atom

Explanation:

The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms. When a neutral molecule has a positive area at one end and a negative area at the other, it is a polar molecule.

Answer:

The oxygen

Hydrogen is positive

Explanation:

Structure that display characteristic of living organisms only within living cells

Answers

this is the answer I hope it helps u

Which statement describes how the atmosphere gains energy by convection?(1 point)

Air warmed by the ground rises.

The ground warms the air just above it.

Solar energy warms gases that make up the air.

Energy moves from the clouds to the air.

Answers

The statement that describes how the atmosphere gains energy by convection is :  Air warmed by ground rises ( A )

The rising warm air from the ground into the atmosphere explains the exchange of heat energy from the ground into the atmosphere through convection and this possible due the variation in density and temperature of the ground air and the atmospheric air.

What is Convection

Convection is the transfer of heat energy through the movement of a medium such as air or water from one region to another. convection can occur as :

Natural convection Forced convection

Hence we can conclude that The statement that describes how the atmosphere gains energy by convection is  Air warmed by ground rises

Learn more about convection : https://brainly.com/question/9382711

What is the yellow structure, and what role does it play in a cell??

Answers

Answer:

Storage of fat

Explanation:

I am very sorry if I'm wrong ✿✿✿

PLEASE HELP THE ASSIGNMENTS DUE TODAY
Which of the following statements about human population growth is TRUE?

(2 Points)

a. The population size is growing, and growth rate is increasing.

b. The population size is growing, and growth rate is decreasing.

c. The population size is decreasing, and growth rate is increasing.

d. None of these is true.

Answers

Answer:

The population size is growing, and growth rate is increasing

Answer: a

Explanation:

how are viroids different from viruses​

Answers

Answer:

We are all familiar with the basics of viruses: These particles infect living cells and wreak havoc throughout the body. But viruses aren’t the only villains around causing chaos in living things. Other infectious agents called viroids and prions — which are also tiny but powerful — can take down both plant life and entire animals.

Viroids are free RNA molecules of low molecular weight without any protein coat, while viruses can have either RNA or DNA molecules encapsulated in a protein coat. Viroids are smaller in size than viruses.

Viroids not made of cells.

Viroids don’t transform energy.

Viroids can’t reproduce on their own.

PLEASE HELP QUICKLY

Match each of the following to the correct organ system.

Lungs

Heart

Veins

Arteries

Stomach

Large intestine

Trachea

Small intestine

Muscles

Bones

Liver

Pancreas

Gall bladder

Kidney

Bladder

Choices are...


A. Skeletal System

B. Excretory System

C. Digestive System

D. Circulatory System

E. Muscular System

F. Respiratory System

Answers

Explanation:

1. stomach - Digestive

2. Brain - Nervous

3. Heart - Cardiovascular

4. kidneys - excretory

5. bone marrow - lymph

6. pituitary gland - endocrine

7. xylem- vascular tissue

8. bones - skeletal

9. Fallopian tubes - reproductive

hope this helps liine some up together i dont give whole answers just try to help ppl out, ill see what i can do thogh, dont quite undderstand can thee be more than one to go with the numbered ones?

which best represents a heterogeneous mixture

Answers

Answer:

cement and water represent the best heterogenous mixture

What information about the organisms best helps the scientists to determine the evolutionary relationships among them?
Anatomical features
Reproductive strategies
DNA Sequences
Habitat types

Answers

Answer:

its c: DNA Sequences

Explanation:

I got it right

How would you define informed consent?
[Type answer here]

Answers

Informed consent is permission granted in the knowledge of the possible consequences, typically that which is given by a patient to a doctor for treatment with full knowledge of the possible risks and benefits.

all of the following are nucleus acids , except
a - adenine
b - iodine
c - guanine
d - cytosine

Answers

Answer:

iodine

Explanation:

Iodine is a chemical not a base. There are only 4 nucleus acids and these are adenine, thymine, cytosine and guanine.

what are the pros and cons of online school​

Answers

Answer:

The Pros and Cons of Studying Online

Pro: Increased Flexibility. The biggest advantage to studying online is the increase in flexibility. ...

Con: Reputation. Many firms and institutions are quick to dismiss an online education. ...

Pro: Ease of Access. ...

Con: Lack of Social Interaction. ...

Pro: More Affordable. ...

Con: Fewer Courses.

Pros of Online Schools:

Time flexibility.

Availability.

24/7 access to course material..

Location flexibility.

Zero commute.

Self-Direction.

Multi-media presentations.

Variety of course options.

Cons of Online Schools:

Limited interaction with instructor.

Technology requirements.

Social interaction.

Campus environment.

Time management.

Stigma.

Credit transfer.

Financial aid.

Have a wonderful day!

What is the mRNA made from the following DNA.
CGATCG?
(please help!)
A. CGTUCG
B. CGATCG
C. GCTAGC
D. GCUAGC

Answers

Answer:

GCUAGC (D)

Explanation:

DNA always consists of A/T and C/G

RNA (mRNA/tRNA always consists of A/U and C/G but never T!

If you have a T in your DNA, your mRNA will have an A.If you have an A in your DNA, your mRNA will have a U.

DNA never has a U, but RNA never has a T.

Hope this makes sense!

what kind of reproduction occuurs with the help of honey bee ?​

Answers

Answer:

Honey bees actually have two types of reproduction. The first type is the kind we normally think of the queen mates, lays eggs, and new bees are born. The second type is whole-colony reproduction. This occurs when the colony splits into two parts.

Explanation:

8.What attaches muscles to bones?

veins
tendons
ligaments
joints

Answers

Tenons attach the muscles to the bones

Why do cells need to transport molecules?

Answers

Answer:

its the cell membrane  

Explanation:

heres gogle support but i also did this in class

What type of materials need to be transported out of the cell?

Water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion (or a type of diffusion known as osmosis ). Diffusion is one principle method of movement of substances within cells, as well as the method for essential small molecules to cross the cell membrane.

Answer:

porque le permite expulsar de su interior los desechos del metabolismo, también el movimiento de sustancias que sintetiza como hormonas.

Explanation:

In rabbits, straight ears (E) are dominant to floppy ears (e). Two rabbits are crossed, and 50% of their offspring have floppy ears. Which cross represents the genotypes of the parents?

Answers

Ee and ee because when you do the punnet square you get 50% Ee which are straight ears and 50% ee which are floppy ears.

Which of the following does NOT involve a type of genetic modification?

a. production of spider web c. use of a malaria vaccine
b. production of human insulin d. bacterial transformation

Answers

Answer:

the answer would be B the production of human insulin

How would Earth be different without the greenhouse effect?(1 point)

A.There would be more solar energy reaching Earth.
B.The atmosphere would contain more methane.
C.The oceans would contain more carbonic acid.
D.There would be more ice on Earth's surface.

Answers

Answer:

I think the answer will be:

D. There would be more ice on Earth's surface.

Explanation:

Without the greenhouse effect, the Earth would have an average temperature of -18°c and life would not be able to survive.

The Earth would be different if the greenhouse gasses didn't even exist.

The Earth's surface would be covered in more ice.

So, option D. is correct.

Define greenhouse effect.

The greenhouse effect happens when solar energy passes through a planetary system and heats its surface, but the air prevents the energy from going directly to space, leading in a warming climate.

The Earth would be different if the greenhouse gasses didn't even exist.

The Earth's surface would be covered in more ice. So, option D. is correct.

Find out more information about greenhouse effect here:

https://brainly.com/question/1577730?referrer=searchResults

Which organelle is the location where mRNA is translated into a protein?
nucleus
ribosomes
cytoplasm
cell membrane

Answers

Answer:

The answer for this question is B Ribosomes

Explanation:

I just took the test on Ed

Answer: The answer is B.

Explanation: Because I got it correct.

what is a tumor and what does it have to do with mitosis
ASAP
will give brainliest

Answers

Answer:

Tumors constantly undergo mitosis.

Explanation:

Tumors are (generally) considered to be cancerous; therefore, they divide uncontrollably. Tumors undergo mitosis just like any other cell in your body but can be dangerous over time if not dealt with.

Answer:

What is cancer and what does it have to do with mitosis?

Cancer: mitosis out of control

Mitosis is closely controlled by the genes inside every cell. Sometimes this control can go wrong. If that happens in just a single cell, it can replicate itself to make new cells that are also out of control. These are cancer cells.

Explanation:

Forgive me if my answer is wrong and please give me BRAINLEST I really need them just give me 5 star rating to give me BRAINLEST

Please help me out!

Diploid is to Body Cell as Haploid is to?
-Sex Cells
-Zygote
-Chromosome
-Sex Chromosome

Answers

i believe it’s sex cells

Select the item(s) that describe a producer.

1.takes energy from the sun
2.helps rot dead organisms
3.fungus
4.tall grass
5.food is mostly animal
6.plant eater
multiple choice

Answers

Answer:

3. fungus

4. tall grass

5. food is mostly animal

most common type of arch, loop and whorl?

Answers

Answer:

yes

Explanation:

most common pattern being found in 65 to 70 percent of all fingerprints

PLS HELP!!!! 10PTS

Reproduction is not a life process still organisms spend a lot of energy on it. Give reason.

Answers

To keep their bloodline running.

Answer:

Reproduction is not a life process, but still organisms spend a lot of energy on it. ... The reproduction is not necessary to ensure living but it is required to ensure that the continuation of the living organisms and generations of the next cycle of living. It is necessary for ensuring the stability of the population.

Reproduction also helps in increasing the population of the species. All the processes which are necessary to maintain life in an organism are called life processes. Reproduction is not considered a life process because it is not necessary to maintain life.

Why are stabilizing proteins neeed to keep the DNA strands separated?

Answers

Single-stranded DNA-binding proteins (e.g., eukaryotic replication factor A [RFA]) then stabilize the unwound template DNA, keeping it in an extended single-stranded state so that it can be copied by the polymerase.

Single-stranded DNA-binding proteins are protected exactly tightly to DNA, but with extremely little carefulness for individual nucleotide sequences.

What is DNA?

They accomplish this by interacting strongly with the DNA backbone, via hydrogen bonds with the ribose and phosphates and complementary control interactions with the phosphates.

When the Proteins of DNA Replication DNA Helicases. These proteins attach to the double-stranded DNA and facilitate the separation of the two strands. DNA single-stranded critical proteins.

Although, These proteins bind to the DNA as a stable tetramer the single-stranded structure is produced by the action of the helicases.

Single-stranded DNA-binding proteins (e.g., [RFA] eukaryotic replication factor A) then stabilize the decompressed template DNA, maintaining it in an extended single-stranded state so that it can be simulated by the polymerase.

Find more information about DNA here:

https://brainly.com/question/8806489

what is combination reaction?

Answers

COMBINATION REACTION:

Combination reaction is a reaction where two or more elements or compounds combine to form a single compound. Such reactions are represented by equations of the following form: X + Y → XY. The combination of two or more elements to form one compound is called combination reaction

An example could be lithium reacting with sulfur to give lithium sulfide. When magnesium burns in air, the atoms of the metal combine with the gas oxygen to produce magnesium oxide.

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