Uracil is a nitrogenous base found in all RNA but not present in DNA. There are multiple unusual modified bases found in tRNAs not found in DNA as well: Dihydrouridine, Pseudouridine, 1-methyl adenosine, N2,N2-dimethylguanosine, inosine, and 1-methyl-inosine. There are other nitrogenous bases that are metabolic intermediates that are not found in nucleic acids such as inosine (also in tarna), hypoxanthine, xanthine, dihydroorotate, orotate, and the purine break down product uric acid.
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differences between the structure of the wall of the stomach and the structure of the wall of the ileum
Answer:
Wall of stomach : it has three layers of muscle instead of two. Under these muscle layers is the adventitia, layers of connective tissue continuous with the omenta. The epithelium of the stomach forms deep pits, called fundic or oxyntic glands.
wall of ileum : The wall itself is made up of folds, each of which has many tiny finger-like projections known as villi on its surface. The ileum has an extremely large surface area both for the adsorption of enzyme molecules and for the absorption of products of digestion.
explain the effect of germination on pea seed respiration
Answer:
"The affect of germination on the rate of cell respiration in peas is that in peas that are germinated, the rate of cell respiration is higher because the cells are growing/going through mitosis which requires energy/ATP in order to be carried out which is generated through the process of cellular respiration."
(Biology Cell Respiration Lab Flashcards | Quizlet)
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What is needed for an organism to survive
what is unique about HIV?
Answer:
HIV is called a retrovirus because it works in a back-to-front way. Unlike other viruses, retroviruses store their genetic information using RNA instead of DNA, meaning they need to 'make' DNA when they enter a human cell in order to make new copies of themselves.
Explanation:
You are learning about mimicry in entomology. Which microscope would be best to look at the wings of two different butterflies to determine which is a Monarch Butterfly and which is a Viceroy Butterfly?
The greatest tool to use to compare the wings of two distinct butterflies and identify which is a Viceroy butterfly and which is a Monarch butterfly is a scanning electron microscope, hence option C is correct.
What is a scanning electron microscope?A focused stream of electrons is used by an electron microscope known as a scanning electron microscope (SEM) to scan a sample's surface and produce images of the material.
Various signals that reveal information about the sample's surface topography and composition appear as the electrons make contact with the sample's atoms.
The electron beam is scanned using a raster scan pattern, and an image is produced by fusing the position of the beam with the intensity of the signal that is detected.
Therefore, to compare the wings of two distinct butterflies and identify which is a Viceroy butterfly and which is a Monarch butterfly with a scanning electron microscope, hence option C is correct.
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The given question is incomplete, so the complete question is,
You are learning about mimicry in entomology. Which microscope would be best to look at the wing of two different butterflies to determine which i a Monarch Butterfly and which I a Viceroy Butterfly?
compound microscope
dissection microscope
scanning electron microscope
tranmiion electron microcope
What organs help to complete digestion in the small intestine?
Answer:
The muscles of the small intestine mix food with digestive juices from the pancreas, liver, and intestine, and push the mixture forward for further digestion.
Dad has blue eyes and Mom has blue eyes. Their daughter, Bonnie, has brown eyes. Is Bonnie adopted? Use the GENOTYPE of each parent to EXPLAIN your answer
Answer:
No, Her parents carried it from other family members because brown is dominant
Explanation:
hope this helps
No, Her parents carried it from other family members because brown is dominant Dad has blue eyes and Mom has blue eyes. Their daughter, Bonnie, has brown eyes.
What is a phenotype of eye color?The allele for green eyes is always dominant over the allele for blue eyes, which is always recessive. You will have brown eyes if at least one of your two copies is brown (Bb), which is what dominance signifies.The allele for brown eyes is the most dominant one and is always dominant over the other two alleles.
Geneticists refer to the various eye color gene variants as B for brown and b for blue, if your mom has blue eyes, your dad has brown eyes, and you have brown eyes.
Therefore, a quarter of the offspring will be born with blue eyes, and three-quarters will be born with brown eyes if both parents have brown eyes but also carry the gene for blue eyes.
Therefore, No, Her parents carried it from other family members because brown is dominant Dad has blue eyes and Mom has blue eyes. Their daughter, Bonnie, has brown eyes.
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identify the statement which is not true
a biologist predict earthquakes
b scientists discover the secrets of nature
c chemists develop new chemical substances
d ecologists observes the behavior of different organisms
mismatched pair among the following is
a rhizobium - symbiosis
b penicillium notatum - fungus
c spirogyra- algae
d streptomycin- vaccine
Answer:
the answer will be a and b
pushing your body to its limits to encourage your body to make physiological changes describes which principle?
how can you tell if an earthquake has occurred?
Scientists can examine sediment samples to get an idea of when major earthquakes occurred in the past. By measuring the amount of time between events, they can come up with a rough idea of when a major quake might hit.
Pharmacodynamic tolerance involves changes in _____________ while metabolic tolerance involves changes in _____________. Group of answer choices A. enzymes / neurons B. neurons / enzymes C. brain / neuron D. neuron / brain
Answer:
B
Explanation:
Pharmacodynamic tolerance involves changes in neurons, while metabolic tolerance involves changes in enzymes.
What is pharmacodynamics?
"Pharmacodynamic interactions" are interactions in which substances directly affect one another's effects. Sedatives, for instance, typically potentiate one another.
Neurons are the cells of the nervous system the cell plants are branch-like structures like the roots of a plant, they contain absorb information using electrical impulses and transport it into different areas of the brain.
The central nervous system contains the brain and the hypothalamus, and the peripheral nervous system contains all the neuron cells.
Therefore, while metabolic tolerance affects changes in enzymes, pharmacodynamic tolerance involves changes in neurons.
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you get 50 points if you can answer correctly please help
Which is the best description of a scientific theory?
A. a statement about how two different variables are related
B. a collection of laws that are explained the same way
c. an explanation of many observations and tested hypotheses
d. an accepted fact that has always been observed to be true
Answer:
c.an explanation of many observations and tested hypotheses
Explanation:
Give me brainlist please
Which of the following is a physical change?
A. sea water drying up and leaving a salt residue
B. cellular respiration
C. baking a cake
D. striking a match
Answer:
sea water drying up and leaving a salt residue
Explanation:
the sequence of events that produces another generation of organisms.
The sequence of events which produces another generation of organisms is called as the Life cycle.
What is Life cycle?Life cycle is defined as the series of changes which members of a species undergo from the beginning of a given developmental stage to the beginning of the same developmental stage in a subsequent generation.
In many simple organisms including bacteria and various protists, the life cycle is completed within a single generation where an organism begins by fragmentation of an existing individual and the new organism grows to maturity which then splits into two new individuals, so the life cycle is complete.
Thus, the sequence of events which produces another generation of organisms is called as the Life cycle.
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Write down the complementary DNA strand that correctly matches with the one
Original DNA
Complementary DNA
GTA ATT CCG AGC GGT
ATG CCC AGA TCG TAG
GGA TAT CAG AAC TTG
A dripping tap or shower head wastes up to:
a) 1000 litres a week
b) 5000 litres a week
c) 3000 litres a week
d) 10000 litres a week
it was raining during lunch and when you entered the building you slipped and fell. What is the reason for this?
Complete the equation for photosynthesis.
+ water
+ oxygen
In light-dependent reactions, light energy is absorbed and converted into chemical energy in the form of
.
Answer:
ATP
I hope this helped...,..........
2.what type of ends do the enzymes bamhi and ecori produce? how does this type of end facilitate cloning?
Answer:
The enzymes BamHI and EcoRI form double bonds and produce sticky ends that facilitate the cloning process. The plasmid DNA can be linked by DNA ligase in the correct orientation in the host genomic DNA.
Explanation:
Can someone plz help me? :(
Answer:
Probably A or B
Explanation:
Describe, step by step, the journey that
carbon dioxide takes from the alveolus
out of the body.
Which of the following describes an
endergonic reaction?
A. this releases energy from a bond by breaking it and ending with
low-energy products
B. this creates bonds that have absorbed energy from its
surroundings and created energy-rich products
C. this rearranges the shape of a molecule to fit into a protein
better
This creates bonds that have absorbed energy from its surroundings and created energy-rich products.
Describes an endergonic reaction?An endergonic reaction is a type of reaction that requires free energy to proceed. An example of an endergonic reaction is photosynthesis because the reaction uses solar energy.
So we can conclude that this creates bonds that have absorbed energy from its surroundings and created energy-rich products.
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Answer:
Look easy answer B that guys answer is long
Explanation:
Summarize the transportation of gases in the human body (respiratory system)
Answer:
As the oxygen rich blood reaches the capillaries gas exchange occurs, oxygen is delivered to the tissues and de-oxygenated blood( loaded with CO2) leaves the tissues of the body and flows back to the heart where it is pumped to the lungs via the pulmonary arteries.
What are macromolecules that contain carbon, hydrogen, oxygen, and nitrogen, needed by the body for growth and repair?
Answer:
protein
Explanation:
A macromolecule that contains carbon, hydrogen, oxygen, and nitrogen, which is used by the body for growth and repair. Protein Synthesis.
This is a two-part process that ends in the assembly of proteins at the ribosomes within cells.
HELP PLEASE PICTURE PROVIDED
Answer:
Students 2 and 3
Explanation:
Students 2 and 3 have aptly described lipids and proteins respectively.
The description of Student 1 corresponds to nucleic acids, while the description fo Student 4 corresponds to Carbohydrates (vice versa).
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Needed by tonight
Answer:
Explanation:75
HELP ME PLS AND THANKS I DON"T KNOW THIS
Answer:
B :)
Explanation:
Answer:
Dichotomous means divided into two parts. That is why dichotomous keys always give two choices in each step. In each step, the user is presented with two statements based on characteristics of the organism. If the user makes the correct choice every time, the name of the organism will be revealed at the end.
Therefore, your answer is A.
Hope this helps! (please pick as brainlyist)
cell can service without energy tell if true or false
Answer:
False most animals would die without energy in there cells, humans would die without energy at some point too
Explanation:
12. During the process of photosynthesis, energy from the Sun is converted into A. chemical energy in the bonds of inorganic molecules B. chemical energy in the bonds of organic molecules C. enzymes used to produce inorganic molecules D. enzymes used to produce organic molecules
Eliminate and explain pls
Answer:
Explanation:
A. Inorganic molecules are rarely present in the human body, and the products of photosynthesis only contain one inorganic molecule (a molecule without carbon), [tex]O_2[/tex].
B. This is correct because when looking at the photosynthesis equation you have [tex]H_2O[/tex] + [tex]CO_2[/tex] + Sunlight = [tex]C_6H_{12} O_6[/tex] + [tex]O_2[/tex] Now illustrating this conversion, the [tex]O_2[/tex] Was made from the breaking of the bonds, so no new bonding was formed, this is the only inorganic molecule. The organic molecule, glucose, or the C6H12O6, was made combining the ingredients H2O and CO2. In order to combine the components used to make the glucose, the energy from the sun helps with the exchange of electrons and facilitates the bonding to make the organic molecule glucose.
C. Sun energy can not be converted into energy used to create enzymes
D. Same as C
How does energy flow in an ecosystem
Answer:
Energy is passed from organisms at one trophic level or energy level to organisms in the next trophic level. Producers are always the first trophic level, herbivores the second, the carnivores that eat herbivores the third, and so on.Hope this helps you !!