DNA is made up of pairs of nitrogenous bases. Which of the following
nitrogenous bases is paired correctly?
A. Guanine-guanine
B. Adenine-thymine
C. Adenine-guanine
D. Cytosine-thymine

Answers

Answer 1

DNA is made up of pairs of nitrogenous bases. The nitrogenous bases is paired correctly is Adenine-thymine. Thus, option B is correct.

How DNA is made up off?

The DNA is formed by the nitrogen bases adenine, cytosine, guanine and thymine. The pairings between bases are -Adenine with Thymine and Cytosine with guanine. Nitrogenous bases are heterocyclic, planar, and relatively water-insoluble aromatic molecules.DNA consist of two types of nitrogenous bases-Purines and Pyrimidines.

Purines are the two common purine bases found in DNA are Guanine and Adenine. Pyrimidine-The two common pyrimidine bases found in DNA are Thymine and Cytosine.

According to the base-pairing rule in DNA- Adenine (purine) pairs with Thymine (Pyrimidine) and Guanine (purine) pairs with Cytosine. Adenine pairs with Thymine with two hydrogen bonds and Guanine pairs with Cytosine with three hydrogen bonds.

Thus, option B is correct.

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Related Questions

Which of the following scenarios represents change to an ecosystem brought about by biotic factors?
a.
a wildfire caused by lightning striking a tree
b. a flood caused by a severe storm
c. a landslide caused by cattle overgrazing
d. a volcanos

Answers

Answer:

C. A Landslide Caused By Cattle Overgrazing

Explanation:

This is the only scenario that represents a biotic factor. All other options are caused by natural disasters.

Your first assignment is to provide information to the firm BigMoney Inc., a chemical producer in Kansas interested in using microbes to clean toxic spills (bioremediation). BigMoney Inc. has had a major spill of inorganic S that contaminated the soil around their plant. Scientists at BigMoney have developed mechanisms for removing H2S from soil, but have not found one for S. They want to know on a strictly theoretical basis (regardless of whether bacteria exist in nature that actually do these specific reactions) if there are any types of bacteria that could use S to give rise to H2S. (7 points total)

S ? H2S (-0.274)

a) is this an oxidation or reduction?

b) is S serving as an electron acceptor or donor?

c) Which of the following metabolisms (aerobic respiration, anaerobic respiration, aerobic chemolithotrophy and anaerobic chemolithotrophy) could be used to carry out this reaction? You can assume the reaction given above is either the initial oxidation reaction or the final reduction reaction. You must think about whether each of these metabolisms can oxidize or reduce inorganic materials. Remember, think strictly theoretically. Note, you must indicate ALL metabolisms that could be used. (1 point)

d) For each of the metabolisms that could be used, describe exactly how H2S will be formed providing the following information: (5 points)

Is the initial electron donor (from where are the electrons being taken) organic or inorganic?

Which of the pathways discussed in class (glycolysis, TCA, electron transport chain, chemolithotrophy, photosynthesis, and fermentation) will be used to get the electrons?

Is the final electron acceptor oxygen or not oxygen, and is it organic or inorganic?

Please provide a specific example of a half reaction (either initial oxidation or final reduction) that would work with the half reaction provided in this scenario, and briefly describe why it was chosen. Hint: your answer must consider the reduction potential of the electron acceptor compared to that of the electron donor and the half equation given must be either the donating or accepting reaction. Note: you may assume other molecules, both organic and inorganic, are present in the soil.

Answers

Answer:

i dont know how to answer this question

Explanation:

Which two atoms form an ionic bond?

A. Sodium and bromine
B. Two oxygen atoms
C. Two sodium atoms
D. Fluorine and chlorine

Answers

A, sodium and bromine. You can think of ionic bonds as happening between elements from different sides of the periodic table. Think of something like table salt, NaCl, which would dissociate into a Na+ ion and a Cl- ion.

What are the signs and symptoms of mumps?​

Answers

Answer:

The primary sign of mumps is swollen salivary glands that cause the cheeks to puff out. Other signs and symptoms may include:

Pain in the swollen salivary glands on one or both sides of your face

Pain while chewing or swallowing

Fever

Headache

Muscle aches

Weakness and fatigue

Loss of appetite

Answer for brainliest!!

Answers

The answer is carbon

Antibodies are composed of two types of peptides, heavy chains and light chains. One of the major classes of antibody molecules is immunoglobulin G (IgG). Two heavy chains and two light chains form one IgG molecule. Classify each statement as describing the heavy chains, light chains, or both chains of IgG

a. form the antigen-binding site
b. contain multiple variable domains
c. are found in the Fab fragment
d. are found in the FC fragment
e. contain only one constant domain
f. contain multiple constant domains
g. contain only one variable domain

Answers

Answer and Explanation:

a. form the antigen-binding site ⇒ both chains

The antigen-binding site is formed by one hypervariable region of the light chain (VL) and one hypervariable region of the heavy chain (VH). So, both type of chains contributes to antigen recognition.

b. contain multiple variable domains ⇒ none

Both chains - light and heavy - contain only one variable domain (VL and VH).  

c. are found in the Fab fragment ⇒ both chains

The Fab fragment is composed of portions of both light and heavy chains: each portion contains one variable domain and one constant domain. The Fab fragment binds specifically the antigen.  

d. are found in the FC fragment ⇒ heavy chains

The Fc region is composed of portions of heavy chains (CH² and CH³), so it contains constant domains.  

e. contain only one constant domain ⇒ light chains

Each light chain contains one variable domain (VL) and one constant domain (CL).  

f. contain multiple constant domains ⇒ heavy chains

Each heavy chain contains three constant domains: CH¹, CH² and CH³.  

g. contain only one variable domain ⇒ both chains

Both light and heavy chains contain one variable domain. The difference is given by the number of constant domains: light chains have 1 constant domain while heavy chains have 3 constant domains.

The California Mussel (​ Mytilus californianus​ ) is the natural prey of the shore crab (​ Carcinus maenas​ ). Study the graph above. Why would a crab adapt to having larger claws according to the graph?

a. Larger claws would help the crab camouflage in the rocks so the mussels won’t see them.
b. Larger claws would help the crab swim fast in a rough current toward where the mussels are hiding.
c. Larger claws would help the crab crack open the shells of the mussels so the crab can eat them.
d. Larger claws would scare away the mussels with thicker shells causing the crabs to choose a new food source.

Answers

Answer:

The correct answer is - c. Larger claws would help the crab crack open the shells of the mussels so the crab can eat them.

Explanation:

The graph (attached) states that the two variables size of claws of the crabs depends on the thickness of the shell of mussels. With the increase in the thickness of the shell of the mussels the size of the claws of crabs also increases and becomes larger.

The most likely explanation of this change would be adapting according to the change in the shell of the crab as they require to crack their shell to eat them as mussels are the primary food source of these crabs.

1.Explain the nature of social science in contrast with the nature of natural science ?

2. What are the social sciences and why is it important to study the fuctioning of human society? ​

Answers

Answer:

1-One of the major differences between the two is that humanities involve a more critical and analytical approach whereas social sciences deal with more of a scientific approach. ... As there is a scientific approach to social sciences, it is considered to be a branch of study in between humanities and natural sciences.

2-Social science examines the relationships between individuals and societies, as well as the development and operation of societies, rather than studying the physical world. These academic disciplines rely more heavily on interpretation and qualitative research methodologies. ... Political science.  

Sociology.The societal behavior is studied and analyzed to achieve broad goals. Social research also contributes to societal development by increasing creativity and innovation. The new idea leads to the up-gradation of society. Focusing on research enhances the knowledge thereby giving more power to the society.

Explanation:

A scientist constructs a graph to show the age structure of the human population of Country Y. The graph is shown here.

What conclusion is supported by the graph?
a. The population is decreasing because there are fewer older members than younger members.
b. The population is relatively stable because there are fewer older members than younger members.
c. The population is relatively stable because the death rate is about the same as the birthrate.
d. The population is increasing rapidly because of the youth of the population.

Answers

theeee anssswwweeerrrr issss (C) forrrrr yourrrrr queessttiioooonnnn

Which organelle is like the brain of the cell? vacuole O endoplasmic reticulum O cytoplasm O nucleus​

Answers

Answer:

nucleus

Explanation:

i remember this from science.

Nucleus is the main control center of the Cell.

Suppose your friend investigated the color of pea pods and concluded that green pods (G) were dominant over yellow pods (g). What experimental evidence would be needed to support this conclusion?

Answers

I honestly do not know sorry

What is a way in which recombinant DNA technology is helping human health?​

Answers

Answer:

Recombinant DNA technology has also proven important to the production of vaccines and protein therapies such as human insulin, interferon and human growth hormone. It is also used to produce clotting factors for treating haemophilia and in the development of gene therapy.

Explanation:

hope this helps :)

Some bacteria possess antibiotic resistance, as well as the ability to survive through adverse conditions. Where in this type of bacteria is the DNA located?
a. nucleoid, fimbriae , and plasmids
b. fimbriae, nucleoid, and endospore
c. endospore, fimbriae, and plasmids
d. plasmids, nuclouid, and endospore

Answers

Answer:

d. plasmids, nucleiod, and endospore

Explanation:

Bacteria are prokaryotic organisms i.e. they do not possess a well defined nucleus in their cells. However, according to this question, some bacteria are said to possess antibiotic resistance, as well as the ability to survive through adverse conditions. These two characteristics of some bacteria is attributed to the possession of a plasmid and endospore respectively.

A plasmid is a circular extra-chromosomal DNA found in bacterial. It is termed "extra" because it is different from the DNA of the bacteria and carries different genes. The genes contained in the plasmid often gives the bacteria added advantage like antibiotic resistance. On the other hand, endospores are asexual spores produced by bacteria in order to withstand adverse environmental conditions like drought etc.

Ferns obtain their food:

from spores
from the ground
by photosynthesis
from other plants
NEED HELP NOW

Answers

The answer is From spores

Dr Mano is a researcher who thinks that the poor performance of the students at his school is due to excessive alcohol intake. What scientific steps can he take to best study his assumptions​

Answers

Answer:

to design an experiment aimed at testing the null hypothesis. Finally, it is required to apply a statistical measure in order to reject or accept the null hypothesis

Explanations:

The scientific method consists in the first place in posing a question that can be used to explain an observation from the real world. This question needs to be subsequently explained by a working hypothesis. In this case, the working hypothesis may be "the poor performance of the students is associated with alcohol intake". Then, it is required to design an experiment in order to confirm or reject the null hypothesis. In this case, the null hypothesis would state that there is no relationship between both groups. The further experiment would consist of testing the performance of the students that consume alcohol versus students that don't consume alcohol. Finally, the results obtained from the experiment must be analyzed by using a statistical measure such as, for example, the p-value, which enables to accept/reject the null hypothesis by assessing the significance level of the results.

I NEED ASAP PLS 20pts‼️‼️

Answers

Answer:

what are the options

Explanation:

Many rainforests are found in the tropics, but only a few are found in cooler temperate zones. What makes a forest a rainforest?



A. They always contain very large rivers or lakes.


B. They produce more oxygen than normal forests.


C. They have a canopy of trees and a great deal of precipitation.


D. They have a large variety of animals that are not found elsewhere.

Answers

I’m pretty sure it is b because

HELPPPPP!!
Which of the following about X-linked traits is true?
O (D) They can passed from father to son
O (A) There are more genetic diseases carried by the Y chromosome than the X chromosome
(C) None of the other choices are correct
O (B) They generally affect more males than females

Answers

Answer:

D

Explanation:

because is formed from father to son

Which organisms transfer nitrogen into a form that is useful to plants?

Answers

Answer:

Nitrogen-fixing bacteria are a type of organisms that transform nitrogen to a form that is useful to plants. These microorganisms are capable of transforming atmospheric nitrogen into fixed nitrogen.

Explanation:

Nitrogen-fixing bacteria are a type of organisms that transform nitrogen to a form that is useful to plants.

I NEED HELP WITH THIS Question someone

Answers

Answer:

domain,kingdom,genus,species,phylum,class,order,family

Fhfhfhfjfjfhfjfjfjjfhfhfhfbfhfbgjgjgjfjfjgjgjfhfjgh363746

PLEASE HELP During a lunar eclipse, what is the penumbra?(1 point)


A. It is the part of the moon’s shadow where the sun is completely blocked.


B. It is the part of Earth’s shadow where the sun is completely blocked.


C. It is the part of Earth’s shadow where the sun is only partially blocked.


D. It is the part of the moon’s shadow where the sun is only partially blocked.

Answers

Answer:

B

Explanation:

Explain this diagram?????????​

Answers

Answer:

the diagram explains the process of DNA digestion and DNA ligation, which is usually used in molecular cloning techniques  

Explanation:

Molecular cloning can be defined as the process used to synthesize multiple copies of a particular DNA fragment. Molecular cloning requires the insertion of a foreign DNA fragment into an appropriate vector (e.g., a plasmid) through the action of specific enzymes that serve to cut and ligate DNA fragments. DNA digestion and DNA ligation use specific restriction enzymes and DNA ligases, respectively, in order to insert the foreign DNA fragment. For this purpose, restriction enzymes that generate single-stranded overhangs are preferred to create sticky ends which bind by complementary base pairing. Subsequently, a DNA ligase enzyme joins the DNA fragments together in order to create recombinant DNA molecules. DNA Ligation is often achieved by using a specific T4 DNA ligase, while there are many restriction enzymes that generate sticky-ends (e.g., BamHI, EcoRI, BaI228I, etc).

The geological time scale is like a..
a. map of Earth's surface
b. calendar of Earth's history
C. relative dating
d. cast fossil

Answers

Answer:

calender of earth history

Explanation:

The geologic time scale is the “calendar” for events in Earth history. It subdivides all time into named units of abstract time called—in descending order of duration—eons, eras, periods, epochs, and ages.

B Calendar of Earth History

Most fungi are aquatic.
True
False

Answers

False
Not “most” fungi is aquatic
Just some if very few


.1
Explain the feedback mechanisms that control ventilation and circulation to include
the pacemaker of the heart.

Answers

It should be noted that the homeostatic feedback mechanisms that are important to regulate the ventilatory pattern of respiration involves the medulla and the pons.

Homeostatic feedback mechanisms.

The pons are divided into two groups. Firstly, the pneumotaxic center sends signals that inhibit inspiration as it limits the activity of the phrenic nerve. Due to this, the signals of the apneustic center and the tidal volume decreases.

Secondly, the apneustic center signals inspiration for deep and long breaths and controls the intensity of breathing. The stretch receptors of the pulmonary muscles inhibit the apneustic center, therefore, it increases tidal volume.

Also, the medulla has two functional regions as well which are the ventral respiratory compartment, that stimulates expiratory movements, and the dorsal respiratory region that triggers inspiratory movements.

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Question 1 of 10
Which behavior is learned?
A. A robin builds a nest using mud, grass, and small twigs.
B. A pigeon begins visiting a local park to look for dropped crumbs.
C. A turtle pulls into its shell when it first encounters a dog.
D. A baby kitten drinks its mother's milk when it's hungry.

Answers

The answer is choice A. All the other ones are natural instincts.

Answer: B. A pigeon begins visiting a local park to look for dropped crumbs.

Explanation:

Can someone help me out

Answers

Answer:

I think meteor or asteroid. I may be wrong but I'm trying to help out!


Laypeople often misunderstand anatomical terminology. What do you think people really mean when they say they have "planter's warts"?

Answers

Answer:

I don't know

Explanation:

wait is this like for an assignment or sum?

Plantar warts are warts located on the sole or plantar surface of your foot. Many people mistakenly call them planter's warts, and perhaps think they have something to do with working in the garden. The pressure of your weight makes them grow flat, under the skin, rather then heaped up, as they can on your fingers or other places.

eagram de ensan energy Pyramid
H
G
F
E
suverom the amount of available energy
3
c
mams the same

Answers

Answer:

i don't know what is this may other help you

All of the visible color light waves together make up white light.

Answer: True

Answers

TRUEEEEE!!!!!!!!!!!!!!!!!!!

Answer:

True

Explanation:

Think of the Pink Floyd logo lol

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