The pairs of nucleotides result in the twisting of strands. Therefore, option "B" is correct.
What is nucleotide base pairing?There are five types of nucleotide bases adenine, cytosine, guanine, thymidine, and uracil. These divide into two classes of nucleotides pyrimidine and purine nucleotide bases. Pyrimidines are uracil, thymine, and cytosine whereas adenine and guanine are purine.
In RNA, adenine, cytosine, and guanine are present but thymine is replaced by uracil. Pyrimidine always binds with the purines through hydrogen bonding. Adenine binds with thymine. Cytosine binds with guanine. But when adenine pairs with uracil in RNA.
Therefore, nucleotide base pairing determines the twisting of the DNA strand depending on the type of nucleotide present.
Learn more about nucleotides, here:
https://brainly.com/question/15900878
#SPJ7
Which of the following objects could be used to model the structure of a DNA molecule?
A. a snowflake
B. a ladder
c. a three-dimensional cube
D. a branching tree
Answer:
Ladder
Explanation:
The structure of the double helix is often described as being like a ladder that has been twisted into a spiral shape. Therefore, option (B) is correct.
What is the structure of DNA?DNA (deoxyribonucleic acid) is a long, linear polymer that is made up of repeating units called nucleotides. Each nucleotide consists of a sugar (deoxyribose), a phosphate group, and one of four nitrogenous bases: adenine (A), guanine (G), cytosine (C), or thymine (T). The sequence of these nitrogenous bases determines the genetic information encoded in DNA.
One of the most common models for the structure of DNA is the "double helix" model, which was proposed by James Watson and Francis Crick in 1953. This model depicts DNA as a double-stranded helix that is held together by hydrogen bonds between the complementary nitrogenous bases A and T, and G and C. The two strands of the helix are antiparallel, meaning that they run in opposite directions. The structure of the double helix is often described as being like a ladder that has been twisted into a spiral shape.
Learn more about DNA, here:
https://brainly.com/question/264225
#SPJ2
identify the kind of digestion that takes place in the mouth
Mechanical digestion takes place in the mouth
what event occured during paleozoic era?
A. diversification of mammals
B. beginning of multicelled life
C. first appearance of most invertebrates
D. dominance of non avian dinosaurs
Answer:
C) first appearance of most invertebrates.
Explanation:
The Cambrian Explosion occurred 542 mya. The earliest complex animals arose in the sea at the beginning of the Cambrian Explosion. It would take another half a billion years for mammals to rise. Multicellular life dates back 1.2 bya, but more cpomplex life, such as animals, did not occur until the Cambrian Explosion. In the beginning of the Cambrian Explosion, many soft-bodied animals, such as jellyfish and sea anemones appeared.
Answer:
C
Explanation:
First appearance of most invertebrates
Glycolysis occurs during aerobic or anaerobic conditions.
True
False
pls help
Answer:
true
Explanation:
Glycolysis occurs in both aerobic and anaerobic states. In aerobic conditions, pyruvate enters the citric acid cycle and undergoes oxidative phosphorylation leading to the net production of 32 ATP molecules. In anaerobic conditions, pyruvate converts to lactate through anaerobic glycolysis
what is the shark's babies called?
please help me.
Answer:
A baby shark is referred to as a pup.
State 3 characteristics of iodated salt
Answer:
1. soluble in water
2. White Crystalline Powder
3. Transparent and Colorless
Cellular respiration is essential for the survival of the Euglena. Why?
Please help me.
Answer:
This organism is able to carry out both photosynthesis and cellular respiration. That's why cellular respiration is essential for the survival of the Euglena.
A sequence of chemical processes known as cellular respiration convert glucose into ATP, which can then be used as energy for a variety of bodily functions.
What is cellular respiration?Glycolysis, the citric acid cycle, and oxidative phosphorylation are the three basic processes that take place during cellular respiration. The citric acid cycle happens in the mitochondrial matrix, oxidative phosphorylation happens on the inner mitochondrial membrane, and glycolysis happens in the cytoplasm.
Glucose, ATP, and NAD+ are the initial reactants and ATP and H2O are the end products of cellular respiration. The enzymes phosphofructokinase-1, pyruvate dehydrogenase, and isocitrate dehydrogenase control the rate of cellular respiration.
Disorders that interfere with cellular respiration often impair one or more of the enzymes necessary for it, such as succinyl-CoA synthase or pyruvate kinase.
Therefore, A sequence of chemical processes known as cellular respiration convert glucose into ATP, which can then be used as energy for a variety of bodily functions.
To learn more about cellular respiration, refer to the link:
https://brainly.com/question/13721588
#SPJ2
A particular enzyme will usually interact with... *
Herbicides are chemicals that kill plants by interrupting important biological processes. Different herbicides affect different plant processes. The herbicide atrazine prevents the chemical reactions that use energy from sunlight.
A plant is sprayed with atrazine.
Exposure to atrazine causes an immediate decrease in the production of two substances in plant. Select the substance.
A. DNA
B. Carbon dioxide
C. Oxygen
D. Phospholipids
Answer:
oxygen because that's one of the substance that plants produce.
You can also do this by the process of elimination. Knowing that atrazine impedes the production of substances in plants, we know that it can't be DNA and Phospholipid. Carbon Dioxide is used by plant, not produced; thus, oxygen is the answer.
A herbicide is a type of pesticide that is used for controlling the weeds so that the plants can get nourishment. They are common weed killers used to clear taw waste groups and constructional areas.
These herbicides are used for different plants and prevents the chemical reaction that makes use of energy. The plants are sprayed with the chemical called atrazine which is used to decrease the production of oxygen.Hence the option C is correct.
Learn more about the kill plants by interrupting important biological.
brainly.com/question/13970708.
what is the last stage of meiosis ?
Answer:
The last stage of meiosis is called telophase
Answer:
TelophaseIs the last stage of meiosisExplanation:
[tex](.. \: \: hope \: it \: helps.. \: \: ..)}[/tex]
what substances are released during celluar resparation? (will mark brainliest)
Answer:
Carbon Dioxide and Water
Explanation:
Water and carbon dioxide are released as byproducts when you breathe.
Answer:
There are two main substances that are released during the process of celluar respiration. These substances are carbon dioxide and water.
Explanation:
What is the path blood takes through the heart, body and lungs.
Answer:
Blood comes into the right atrium from the body, moves into the right ventricle and is pushed into the pulmonary arteries in the lungs. After picking up oxygen, the blood travels back to the heart through the pulmonary veins into the left atrium, to the left ventricle and out to the body's tissues through the aorta.
Explanation:
Answer:
1) body –> 2) inferior/superior vena cava –> 3) right atrium –> 4) tricuspid valve –> 5) right ventricle –> 6) pulmonary arteries –> 7) lungs –> 8) pulmonary veins –> 9) left atrium –> 10) mitral or bicuspid valve –> 11) left ventricle –> 12) aortic valve –> 13) aorta –> 14) body.
Explanation:
this is full path of blood with every single detail
 In order for a male to have the recessive disease, what what is genotype be?
Answer:
im pretty sure it will be XX
.
A __________ is a physical trait one can see, while a __________ is the section of DNA associated with a certain trait that causes it to appear.
allele, gene trait
genotype, phenotype
DNA, inherited trait
phenotype, genotype
Answer:
Phenotype
Genotype
Explanation:
Phenotype is the physical appearance because it's the outward expression of the person, which is determined by one's Genotype.
what you mean by accessory pigments?
Write a short note on broyophytes?
Answer:
Bryophytes are an informal group consisting of three divisions of non-vascular land plants: the liverworts, hornworts and mosses. They are characteristically limited in size and prefer moist habitats although they can survive in drier environments. The bryophytes consists of about 20, 000 plant species.
[tex]\underline{QUESTION:_}[/tex]
[tex]Write~ a ~short~ note ~on~ bryophytes?[/tex]
-----------------------------------------------
[tex]\underline{ANSWER:-}[/tex]
Bryophytes are a loose classification of three non-vascular land plant embryophytes: liverworts, hornworts, and mosses. They are typically small and prefer damp surroundings, however, they may thrive in drier ones. There are over 20,000 plant species in the bryophytes.[tex]\underline{-----------}[/tex]
[tex]\textnormal{HOPE IT HELPS}[/tex]
[tex]\textnormal{HAVE A GREAT DAY!!}[/tex]
In a non-mutated DNA strand, what base pairs with guanine?
Answer:
Attached to each sugar is one of four bases--adenine (A), cytosine (C), guanine (G), or thymine (T). The two strands are held together by hydrogen bonds between the bases, with adenine forming a base pair with thymine, and cytosine forming a base pair with guanine.
Explanation:
Answer:
cytosine pairs with guanine.
All of the following are true about the structure of DNA excepta.
a. the long strands of nucleotides are twisted into a double helix.
b. short strands of DNA are contained in chromosomes inside the nucleus of a cell.
c. DNA consists of two strands of nucleotides joined by hydrogen bonds.
d. every DNA nucleotide contains a sugar, a phosphate group, and a nitrogen base.
Answer:
short strands of DNA are contained in chromosomes inside the nucleus of a cell.
Explanation:
DNA is an acronym for deoxyribonucleic acid. It is composed of a sugar, a phosphate group, and a nitrogen base.
DNA consists of two strands of nucleotides joined by hydrogen bonds. This makes DNA appear in a double helical structure.
Long strands of DNA are contained in chromosomes inside the nucleus of a cell. Long strands of DNA in the nucleus are rolled into neat little bundles. Hence the statement; ''short strands of DNA are contained in chromosomes inside the nucleus of a cell'' is false.
During his trip on the HMS Beagle, Darwin found that ______________.
A plants and animals living in temperate regions were most similar to each other, regardless of the continent on which they were found.
B fossils found on a particular continent were clearly not related to the plants and animals living on that continent today.
C plants and animals were similar on every continent and in every type of region.
D plants and animals living on one continent seemed more closely related to each other, than to plants and animals living in similar regions on other continents.
Answer:
Option D
Plants and animals living on one continent seemed more closely related to each other than to plants and animals living in similar regions on other continents.
Explanation:
From Darwin's discoveries, he noticed that there was a strong relationship between the environment and the characteristics of the living organisms present there. He proposed that the environmental conditions affected the development of certain traits in organisms present there, in their quest for survival and adaptation.
These traits were passed down from parents to offspring, producing a population of organisms with similar character traits found around the same geographical location (continent in this case)
All of the prairie dogs that live in a town make up
Answer:
Black-tailed prairie dogs are social animals that live in towns, or colonies, which are further divided into familial neighborhoods, or coteries. The number of prairie dogs in each town can fluctuate, but will normally amount to 12 individuals per 2.5 acres (1 hectare).
What is the difference between a hepatic duct and a hepatic vein?
Explanation:
The liver is connected to two large blood vessels, the hepatic artery and the portal vein. The hepatic artery carries blood from the aorta to the liver, whereas the portal vein carries blood containing the digested nutrients from the entire gastrointestinal tract, and also from the spleen and pancreas to the liver.
Which cells lack of nucleus ?
A. Muscle cell
B. Euglena
C. Fungal cell
D. Bacterial cell
Answer:
D. Bacterial cell
Explanation:
Directions: Consider a pedigree that is tracking an autosomal recessive trait, where two recessive alleles (tt) result
in the inability to taste a chemical known as PTC. The ability to taste PTC is determined by the presence of a
dominant allele (T). Complete the missing boxes in the chart. The first row has been done for you as an example!
Note: The ability to taste PTC may be more complex than a simple gene trait.
Individual Phenotype
Shaded?
PTC taster
Shape (in Pedigree)
Square
2.
No
1.
3.
4.
5.
6.
Male with genotype TT
Male with genotype Tt
Male with genotype tt
Female with genotype TT
Female with genotype Tt
Female with genotype tt
7.
8.
9.
10.
11.
12.
13.
14.
15.
When 2 or more organisms compete for the same resource there can be a variety of outcomes. What would be one of those outcomes?
Answer:
The biology branch deals with the relations between and physical environment of organisms.
Explanation:
The principle of competitive exclusion states that if two species occupy the same niche, they cannot exist together (competing for identical resources). Two species whose niche overlap can evolve to have different niches through natural selection, resulting in the distribution of resources.
In ecology, interspecific competition is a form of competition where individuals from different kinds compete in an ecosystem for the same resources (e.g. food or space)... There may be interspecific competition if people of two separate species share a limited resource within a single area.
Neutral theory proposes that
A) molecular clocks are more reliable when the surrounding pH is close to 7.0.
B) most mutations of highly conserved DNA sequences should have no functional effect.
C) DNA is less susceptible to mutation when it codes for amino acid sequences whose side groups (or R groups) have a neutral pH.
D) DNA is less susceptible to mutation when it codes for amino acid sequences whose side groups (or R groups) have a neutral electrical charge.
E) a significant proportion of mutations are not acted upon by natural selection.
Answer:
The correct answer is E) a significant proportion of mutations are not acted upon by natural selection.
Explanation:
The neutral theory, proposed by Motoo Kimura in 1968, proposes that part of the molecular variability produced by mutations that exists in populations is natural variability, that is, a large part of the genetic variation observed in populations is due to random fluctuation of genetic variants that are neutral, on which natural selection hardly acts, so they are not an evolutionary force since they do not contribute predominantly to natural selection and proposes genetic drift as an evolutionary mechanism.
Question 7 of 25
Which structure is used by the organism to see the outside world?
Answer:
install
Explanation:
Answer:
Eye
Explanation:
We use the eye to look at things
Which of the following is an example of artificial selection?
Answer: last option
Explanation:
artificial selection is when humans basically pick a desirable trait in a species and take steps to enhance or perpetuate that specific trait so that it's more common
the best option to describe this is the last one, because humans have bred domestic dogs to be less aggressive and more playful or friendly
PLEASE SOMEONE HELP MESS
Answer:
It's B.
Explanation:
uhm, i already went in one? btw, why "mess"? ️ ️
Guanine bonds with
????
Answer:
Answer
cytosine
correct me y'all if am wrong ❤️
In which order do organisms return
to an ecosystem during primary
succession after an area's ecosystem
has been wiped out?
A. trees, hearty shrubs, lichens
B. lichens, trees, hearty shrubs
C. lichens, hearty shrubs, trees
Answer:
lichens, hearty shrubs, trees
Explanation:
Order:
I-bare rocks,
II-pioneers (mosses, lichen, algae, fungi)
III-annual herbaceous plants
IV-perennial herbaceous plants and grasses
V-shrubs, VI-shade intolerant trees, VII-shade tolerant trees.
(please mark me brainliest) :)
Lichens, hearty shrubs, and trees is the correct order in which the organisms return to an ecosystem during primary succession after an area's ecosystem has been wiped out. Thus, the correct option is C.
What is Primary Succession?Primary succession is the ecological succession which begins in essentially the lifeless areas, such as the regions in which there is no soil or where the soil is incapable of sustaining life where no life form ever existed because of recent volcanic eruption, newly formed sand dunes, or rocks that are left from a retreating glaciers.
The correct order of the Primary Succession is:
Stage I- Bare rocks,
Stage II- Pioneer species such as mosses, lichen, algae, and fungi
Stage III- Annual herbaceous plants
Stage IV- Perennial herbaceous plants and grasses
Stage V- Shrubs, shade intolerant trees, and shade tolerant trees.
Therefore, the correct option is C.
Learn more about Primary Succession here:
https://brainly.com/question/26675203
#SPJ2
