Answer:
Yeast do not have the lactase enzyme and cannot break down lactose. If you add lactaid, lactose will be broken down into glucose and galactose, which can be used by the yeast.
Explanation:
Hope this helped =>
Phenylketonuria (PKU) is a disease that is caused by the mutation of a single gene. The mutation can cause several problems, such as mental ret*rdation, lightly colored hair and skin, and lower IQ.
The disease phenylketonuria is an example of how
A.
a single gene can only affect a single trait.
B.
multiple genes can affect a single trait.
C.
a single gene can affect multiple traits.
D.
all of these
Answer:
C ..A single affect multi traits
Answer:
C ..A single affect multi traits
Explanation:
What can be used to illustrate evolutionary classification, or cladistic analysis
Your mom and dad each gave you 23. They make you, you and me, me. – What is it?
Answer:
92
Explanation:
23 * 4 = 92
hope this helped
The presence of fecal coliform bacteria in a sample of river water suggests which of the following?
The pH of the river is very high.
The water is contaminated with animal waste.
The river is devoid of plant life.
The dissolved oxygen level of the river is high.
Fish caught from the river will be free of parasites.
Answer:
Water is contaminated with animal waste
Explanation:
The presence of fecal coliform bacteria in a sample of river water suggests that the water is contaminated with animal waste. Thus, the correct option for this question is B.
What is the significance of fecal coliform?The presence of fecal coliform in any sort of river or drinking water often indicates fecal contamination. This means that there is a greater risk that pathogens are present than if only total coliform bacteria are detected. E. coli is a sub-group of the fecal coliform group.
If coliform bacteria are present in your drinking water, your risk of contracting a water-borne illness is increased. This is because these bacteria are the most potent source of waterborne illness. Although total coliforms can come from sources other than fecal matter, a positive total coliform sample should be considered an indication of pollution in your well.
Therefore, the presence of fecal coliform bacteria in a sample of river water suggests that the water is contaminated with animal waste. Thus, the correct option for this question is B.
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PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!!PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!!
Answer:
c
Explanation: It is younger because it retains most of its potassium. This means that the potassium has not had time to break down yet. In the second rock there is little to none of it's original potassium. Meaning it has existed long enough for most of the potassium to break down.
what cause ocean acidification.
Answer: Ocean acidification is primarily caused by the uptake of carbon dioxide from the atmosphere .
Explanation:
Which countries would be impacted if the world transitioned away from coal?
Answer:
…
Explanation:
PLEASE solve number 1 and 2 because i don’t get it , don’t mind my answers
Answer:
1) RNA strand = UCA GCA AAU
2) Amino acids: Asparagine Arginine Stop
(ASN) (ARG) (STOP)
Explanation:
Some theory that you need to know to answer the question:
Each tRNA has two important sites. One of them that couples with the codon of the mRNA molecule, named anticodon. The other site couples with an amino acid through the action of the aminoacyl-tRNA synthase enzyme. The whole complex, amino acid + enzyme + tRNA is named aminoacyl-tRNA. Considering that there are twenty amino acids available, there are also twenty complexes of aminoacyl-tRNA, one for each amino acid.
tRNA allows amino acids to align according to the nucleotidic sequence in the mRNA molecule.
Once the new amino acid joins the growing peptidic chain, the binding between the amino acid and the tRNA molecule breaks. The tRNA is now free to join another amino acid and repeat the cycle.
Now, to fill in the boxes, you need to pay attention to two things:
• Anticodon: In this box, you need to place the sequence of bases that pairs with the mRNA codon.
• Amino Acid: In this box, you need to place the amino acid that is codified by the mRNA codon.
For instance, let us say that the codon of mRNA is CUC. The anticodon for this sequence is GAG (because guanine joins cytosine and adenine joins uracyl).
The amino acid places on the 3´extreme of the tRNA molecule will be the one that is codified by the codon, NOT the anticodon. So, as the codon is CUC, the amino acid will be Leucine, Leu. Do not use the anticodon GAG to fill these boxes. Remember that tRNA is translating information carried by the mRNA, so we need to use this information to grow the protein.
1)
Strand of DNI → AGT CGT TTA
Each of these letters are bases → Adenine, A - Guanine, G - Thymine, T - Cytocine, CEach of these three-lettered groups are codons.So, we need to pair these bases, knowing that:
Adenine (A) and guanine (G) derive from purines, while Thymine (T) Uracile (U), and Cytosine (C) derive from Pyrimidines.
In the DNA molecule, Adenine (Purine) always pairs with Timine (Pyrimidine), while Guanine (Purin) forms pairs with Cytosine.
In the RNA molecule, Adenine is paired with Uracil, U. So, whenever there is an Adenine in the DNI strand, it pairs with Uracil of RNA strand. If there is a Thymine in the DNI strand, it pairs Adenine of the RNA strand. And, as always, Guanine pairs with Cytosine.
A ⇒ UT ⇒ AG ⇔ CKnowing how to pair bases, we can fill the RNA molecule boxes.
Strand of DNI → AGT CGT TTAStrand of RNA → UCA GCA AAUA ⇒ U C ⇒ G T ⇒ A
G ⇒ C G ⇒ C T ⇒ A
T ⇒ A T ⇒ A A ⇒ U
2)
Now we need to translate these new codons of mRNA to amino acids.
To fill the boxes you should have a genetic code chart to see the codons that codify for each amino acid.
Codon: AAU CGA UAG
Amino acids: Asparagine Arginine Stop
(ASN) (ARG) (STOP)
The new protein is synthesized from the amino terminus to the carboxy terminus of the mRNA molecule. The added amino acids to the chain are coded by a codon formed by three bases in the mRNA. mARNs also have a start and end codon that are the signals of the synthesis initiation and finish. When the ribosome reaches a stop codon, protein synthesis is over.
Explain the difference between sexual reproduction and asexual reproduction. Explain either an advantage or disadvantage for
each.
In asexual reproduction, reproductive organs aren't used but they're used.
advantage of sexual- A lot of genetic variation. since they have DNA of two parents. they can survive more and adapt more.
disadvantage of asexual- diversity is limited. Since the organism only gets the DNA of one parent, they wouldn't be able to really survive if something happened.They would easily be extinct.
Sorry I can't really cone up with better words but I hope you get the idea. it all comes down to natural selection really if you've learned about it. Hope it helped!!!
During fertilization gametes join to form a diploid cell known as a ________
Answer:
zygotes
Explanation:
Human fertilization and development
Fertilization is the process in which haploid gametes fuse to form a diploid cell called a zygote. To ensure that each zygote has the correct number of chromosomes, only one sperm can fuse with one egg.
Asexual reproduction is the when only one parent contributes genetic information creating an identical offspring. true Or false?
Answer:
That is a true statement
Where were the earth's landmasses located? How did they differ from today?
PLEASE HELP ASAP
If an individual has trisomy 21, what is true of the individual's chromosomes?
There are 21 chromosomes in each body cell.
There is a deletion of chromosome 21.
There are 47 chromosomes in each body cell.
There are 47 chromosomes in half the body cells.
Answer: There are 47 chromosomes in each body cell.
Explanation:
Answer:
there are 47 chromosomes in each body cell
Explanation:
Watson and Crick made a successful model of DNA based on Rosalind Franklin's X-ray studies. This indicated that DNA was
A.
a triple helix with intertwined bases.
B.
a double helix with bases outside the helix.
C.
a double helix with bases inside the helix.
D.
a single linear molecule of bases held together by sugar-phosphate bonds.
Answer:C. a double helix with bases inside the helix
ExpAnswer: I got it correct
ASAP PLS! I WILL GIVE BRAINLESEST
Why does a vasectomy not affect urine flow?
(FETAL PIG LAB)
Answer:
A vasectomy has no effect on libido, erections, or urination. The amount of semen a man ejaculates will not change after a vasectomy; the only difference is that there are no sperm in the ejaculate. The testicles will also continue to produce testosterone at the same rate.
Explanation:
Vasectomy is the surgical method of male sterilization or permanent contraception. During this process, the male vasa deferentia are cut and sealed to prevent sperm from the urethra and thereby prevent fertilization.
Vasectomy is done in the case of males. Many males are concerned about urination and erection. It is the different duct where urine uses the ureter and sperm uses the gas deferens.
Vasectomy is a method of contraception that has no effect on libido, urination, and erection. Hence the vasectomy does not affect urine flow.
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Induced Pluripotent Stem Cells are:
Answer:
I think it's the first one
2 C2H6 + 702 — 4 CO2 + 6H2O
How many moles of O2 are required to
react with 1 mole of Ethane?
We calculate the number of moles of water given its mass by dividing the mass by the molar mass.
n water = (36.04 g) / (18 g/mol)
n water = 2 mols
From the given balanced equation, every 6 moles of water produced will require 7 moles of oxygen.
n oxygen = (2 mols H2O) x (7 moles O2 / 6 moles H2O)
n oxygen = 2.33 mols O2
What do these questions mean ? WILL GIVE BRAINLIEST :) pls give an example etc
Answer:
long story short, its asking how their relationships made them lost, so what they are asking is what made them lost as their characteristics.
Explanation:
so yeah
Where should people focus their efforts when improving transportation energy efficiency?
A)
automobile design
B)
bus design
C C)
train design
D)
airplane design
The diagrams below represent a human organ system
The major function of the system is to?
(1) provide immunity essential for the survival of each individual in a population (2) provide cells that are necessary for the survival of the species
(3) produce chemical messages that are necessary for nerve cell development (4) control the passage of nutrients into and out of a developing fetus
Answer: (2) provide cells that are necessary for the survival of the species
Explanation:
how is the structure of a nerve cell specialised to carry out its functions
Answer:
A typical neuron consists of a cell body (soma), dendrites, and a single axon. The soma is usually compact. The axon and dendrites are filaments that extrude from it. Dendrites typically branch profusely and extend a few hundred micrometers from the soma. The axon leaves the soma at a swelling called the axon hillock (the axon hillock also has the greatest density of voltage-dependent sodium channels. This makes it the most easily excited part of the neuron and the spike initiation zone for the axon) and it branches but usually maintains a constant diameter. At the farthest tip of the axon's branches are axon terminals, where the neuron can transmit a signal across the synapse to another cell.
In general, dendrites receive the electrical signal from other neurons, and this signal is transmitted over long distances from the axon.
Like all animal cells, the cell body of every neuron is enclosed by a plasma membrane, a bilayer of lipid molecules with many types of protein structures embedded in it. A lipid bilayer is a powerful electrical insulator, but in neurons, many of the protein structures embedded in the membrane are electrically active. These include ion channels that permit electrically charged ions to flow across the membrane and ion pumps that chemically transport ions from one side of the membrane to the other to generate the action potential that generates the electrical signal. They also have a highly developed synthetic apparatus for the production of neurotransmitters
An analysis of DNA and RNA sequences can be used to classify organisms. A dendrogram, such as the one shown below, is based on molecular data. It can be used to represent evolutionary relationships within a group of organisms that are hypothesized to have descended from a common ancestor. Brown bear Sun bear Spectacled bear Giant panda Lesser panda Raccoon Dog 100 0 So 60 40 20 Mulions of Years Ago 13 Which statement is best supported by the information in this dendrogram?
Answer: C
Explanation: Lesser pandas are more genetically similar to raccoons that they are to giant pandas.
The statement "Lesser pandas are more genetically similar to raccoons than they are to giant pandas" is not fully supported by the information in the dendrogram presented above.
What does the dendrogram suggest basically ?While it is true that the dendrogram suggests that the giant panda and lesser panda share a more recent common ancestor than either does with the other bears or the raccoon dog, it does not provide evidence to support the claim that the lesser panda is more genetically similar to raccoons than to giant pandas.
The dendrogram provides evidence for the evolutionary relationships among these organisms based on their DNA and RNA sequences. It suggests that these organisms have a common evolutionary history and can be grouped together based on their molecular data.
However, it does not provide information on the degree of genetic similarity between any two specific organisms or groups of organisms.
Therefore, while it is possible that the lesser panda may be more genetically similar to raccoons than to giant pandas, this claim cannot be fully supported by the information in the dendrogram alone.
Further analysis of genetic data and comparison of specific genetic sequences would be necessary to determine the degree of genetic similarity between these organisms.
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PLEASE HELP ME FILL IN THE BLANKS ASAP!!!!!!!!!!!!!! GIVING AWAY 18 POINTS!!
1. D. Marine
2. A. Desert
3. E. Freshwater
4. C. Grassland
5. B. Tundra
If there is a #6, then the answer would be F. Tropical rainforest
Sam, who has type A blood wants to donate blood to his sister Mia, who has type O blood. Can he donate his blood to her? Why or why not?
I need help please
Explain why males can be carriers for an autosomal disorders but not for an x-lined disorder.
Answer:
In order to be a carrier, the male must be a carrier of the allele without expressing it phenotypically. This can only happen when the inheritance is autosomal because he has a pair of autosomic chromosomes meanwhile he only has one X chromosome. So when the inheritance is X-linked, the allele of the X chromosome will always be phenotypically expressed
The reason cows belch methane gas and humans do not is because ?
a. Cows have a two-chambered stomach
b. Cows digest the grass they eat into carbon dioxide
c. Cows ferment their food while it is digesting and nitrous oxide is a by product.
d. Cows ferment their food while it is digesting and methane gas is a by product
https://www.nytimes.com/2020/10/21/climate/beef-cattle-methane.html?smid=url-share
Answer:
D
Explanation:
when we drink soda and we burp it is because of the gases that are created when digestion happens, same for the cow, just with food.
Moles and freckles are similar in that they are both:
skin abnormalities
growths
caused by an even distribution of melanin
caused by an uneven distribution of melanin
Answer:
I believe that the answer would be skin abnormalities.
Explanation:
Growths do not apply.
Melanin applies mainly to freckles.
NEED HELP
How do we use ATP in our body?
Explanation:
ATP is consumed for energy in processes including ion transport, muscle contraction, nerve impulse propagation, substrate phosphorylation, and chemical synthesis.
how the exposure to penicillin affects the survival of some bacteria in the population
Answer:
When exposed to penicillin, the frequency of resistant bacteria will increase as those that are resistant survive and reproduce. — The resistant bacteria will survive and they will produce offspring that are resistant
Explanation:
pls mark brainliest
PLEASE HELP!! I'LL GIVE A THANKS, FIVE <3, AND BRAINLIEST!!!! ASAP
A. Identify two examples of environmental factors that may impact myeloperoxidase activity. Describe how each of the environmental factors would affect the reaction tare of an enzyme.
B. Predict the how researchers can use myeloperoxidase activity as oxidative stress biomarkers in patients with rheumatoid arthritis. Provide reasoning to justify your prediction.
Answer:
So... MPO is most abundantly expressed in neutrophil granulocytes, and produces hypohalous acids to carry out their antimicrobial activity through oxidative damage during the respiratory burst. It requires heme as a cofactor.
Regarding environmental factors ... obviously the first factor is the presence of an infection and inflammation that cause an increase in the activity and production of MPO. Second, alterations in the MPO gene cause its congenital deficiency which predispose to infections.
Rheumatoid arthritis is an autoimmune and autoinflammatory rheumatoid disease in which significant joint damage is observed. In the joint capsule, inflamed infiltrates are observed composed of neutrophils and lymphocytes. Measurement of MPO levels in the joint cavity could therefore be related to the amount of neutrophils and thus to the extent of the inflammatory damage.
When the respiratory burst occurs, MPO is most abundantly expressed in neutrophil granulocytes, which then create hypohalous acids to carry out their antimicrobial function through oxidative damage.
What is MPO?Regarding environmental causes, the first one is undoubtedly the existence of an infection and inflammation, which elevate MPO activity and production.
Second, changes to the MPO gene result in its congenital deficit, which makes people more susceptible to infections.
Therefore, the amount of neutrophils and, consequently, the severity of the inflammatory response might be connected by the measurement of MPO levels in the joint cavity.
Therefore, When the respiratory burst occurs, MPO is most abundantly expressed in neutrophil granulocytes, which then create hypohalous acids to carry out their antimicrobial function through oxidative damage.
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