Answer:
A
Explanation:
Quite simple actually. When a blood cell loses its nucleus it has no type of genetic code in order for it to function. With no DNA or Nucleus, the organelles inside the cell serve no purpose. This causes the cell to either swole or shrink. This is a form of mutation. This happens when there is no activity in the cell and it loses its proteins in the cell membrane, which leads the cell to use passive homeostasis more often than active. With no genetic code for it's cell transport, the cell gives out more necessary molecules, or takes in more necessary molecules.
If a nucleotide is missing in a replicated DNA, it would lead to a change in the gene expression which would lead to mutation. The correct answer is option d.
An alteration in the DNA sequence is known as a mutation, which can happen spontaneously or as a result of toxins or radiation. An organism may experience no effect, negative consequences, or positive effects as a result of a mutation.
Option d here refers to a mutation in which a nucleotide is absent from a DNA molecule that has been duplicated. The building components of DNA are called nucleotides, and if one is absent, the genetic code can be changed. This alteration in the DNA sequence may have serious repercussions, including the development of hereditary illnesses or disorders.
Therefore, a nucleotide is missing in a replicated DNA is an example of mutation i.e. Option D.
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Which list correctly orders the parts of an atom from heaviest to lightest in mass?
А
electron, proton, nucleus, neutron
В.
neutron, proton, nucleus, electron
С.
proton, neutron, electron, nucleus
D
nucleus, neutron, proton, electron
Answer:
nucleus, neutron, proton, electron
Explanation:
The list that correctly orders the parts of an atom from heaviest to lightest
in mass is as follows:
nucleus, neutron, proton, electron
The nucleus of an atom is composed of a tightly packed proton and
neutrons.
This makes the nucleus very dense and small. The nucleus are surrounded
by a negatively charged electron.
The nucleus contribute to most of the weight of an atom.
This makes the nucleus the heaviest.
The neutron is found in the nucleus of an atom. The neutrons are
electronically neutral. The neutron are slightly heavier than proton.
Therefore, the neutron is the second heaviest part of an atom.
The proton is found in the nucleus of an atom. They a positively charged.
The proton is the third heaviest.
The electron revolves around the nucleus and are very light. In fact the
nucleus contributes to 99.9 % of the weight of an atom. This shows how
light the electrons are.
Therefore, the order from the heaviest to the lightest is as follows:
nucleus, neutron, proton, electron
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I’m thinking both what do you all think??
Answer:
I actually think a chemical change
Explanation:
The chemical composition should not change in a physical change so therefore I think it’s only a chemical change
Explain how eutrophication can change an aquatic ecosystem into a land ecosystem. *
This species of squirrel has been separated by the Grand
Canyon. Which term best describes the differences
between them?
) Variation
O b) Extinction
Population
d) Overpopulation
Hurry I have 10 minutes left pls
Answer:
Explanation:b
what is the genetic causes of edward syndrome
Answer:
A baby with Edwards' syndrome has 3 copies of chromosome number 18 instead of 2. This affects the way the baby grows and develops. Having 3 copies of chromosome 18 usually happens by chance, because of a change in the sperm or egg before a baby is conceived.
Explanation:
23. What is MOST likely TRUE about forensic scientists?
A
They have to follow the rules of the judicial system.
B
Most are biologists who decided to study forensics.
C
They are not permitted to use hazardous materials.
D
Many of them become certified immediately after high school.
Answer:
d
Explanation:
many of them become certified
Answer:
They have to follow the rules of the judicial system.
but if not i believe it might be b :) hope this helps!
Explanation:
How are living things put together?
Answer:
All living things are made of cells; the cell itself is the smallest fundamental unit of structure and function in living organisms. In larger organisms, cells combine to make tissues, which are groups of similar cells carrying out similar or related functions.
Explanation:
A plant can be classified in more than one category. True False
Answer:
true
Explanation:
theres a bunch of different categories depending on the subject
Which is the number of chromosomes in a haploid cell?
1n
2n
3n
4n
Answer:
Answer: Option A.
Explanation:
Haploid cell is the cell that have a single set of chromosomes . In human, haploid cells have 23 chromosomes compare to 46 number of chromosomes diploid cells have.
Answer: 23 chromosomes
Explanation:
why is forcing the cell to increase the rate of the cell cycle lead to error in DNA replication
DNA consists of ____ chains(s) of subuints, and RNA consists of _____ chain(s).
DNA has two chains of subunits and RNA has only one chain of subunits.
What are the differences between DNA and RNA?
DNA or Deoxyribonucleic acid is a nucleic acid structure. Its function is to work as an original blueprint or the basic code for protein synthesis. A DNA molecule has deoxyribose sugar, it has lost an oxygen molecule from the 3' carbon.
It also has phosphates and nitrogenous bases like adenine (A), guanine (G), cytosine (C) and thymine (T) in a unique sequence. These sequences form two chains which are intertwined to form a double helix.
Ribonucleic acid or RNA is also a nucleic acid. This directly takes part in protein synthesis. It is an important nucleotide and has nucleic acid in long chains that are present in all living cells. It has ribose sugar. It has the same nucleotides as DNA except for uracil (U) replaces thymine (T).
The main role of RNA is to act as a messenger. It gets instructions from DNA and uses them for controlling protein synthesis. This is present in a single chain.
Therefore, DNA has two chains of subunits and RNA has only one chain of subunits.
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how do people tend to use land as the human population increases?
Answer:
C
Explanation:
As more humans are increasing we need food
Can you help me please
Answer:
what is the question? please give more details
Explanation:
Which two major parts of the Earth system does this photo most cieery
show?
A. Geosphere
B. Cryosphere
C. Atmosphere
D. Biosphere
Answer:
I'd say that your answers are A) and B).
ignore how i selected them) PLEASE HELP ME. DO IT CORRECTLY PLEASEEEEEEE
What is the benefit of
starting with two coples
of each chromosome in
Interphase I?
Answer:
Here u go sorry if wrong, if right u welcome ;)
The S phase of a cell cycle occurs during interphase, before mitosis or meiosis, and is responsible for the synthesis or replication of DNA. In this way, the genetic material of a cell is doubled before it enters mitosis or meiosis, allowing there to be enough DNA to be split into daughter cells
Punnet square? Someone know who to do this
Answer:
Punnet squares are basically how you can somewhat "predict" the outcome of gene pools.
Explanation:
As you can see, the capital letters (RY) are dominant alleles meaning they will be the trait that shows no matter what. the lower case letters (ry) show recessive traits and will only show if paired with another recessive gene.
Genotype is the actual makeup so the letters. (Rr, Ry, ry... etc.)
Phenotype is the trait that shows such as brown hair, blue eyes, etc.
Frequency is just how many times the gene shows up and put as a fraction or percent.
One strand of DNA nucleotides is read as 5' - GCATATTG - 3'. What would
be the complementary strand?
Answer:
The correct answer would be: 3' - CGTATAAC - 5'
Explanation:
DNA molecule is a double-stranded molecule structure that has two distinct nucleotide chains joined together with hydrogen bonds between the nitrogenous bases of each strand. Adenine binds with thymine and cytosine binds with guanine by hydrogen bonds always in complementary strands.
These strands are complementary to one another as they have complementary bases in the complementary strand of one nucleotide chain of DNA. So,
5' - GCATATTG - 3' - DNA nucleotide of one strand
3' - CGTATAAC - 5' complementary strand
list 5 characteristics that genes code for.
loop of Henle concentration gradient
Answer:
The Loop of Henle serves to create a concentration gradient throughout the nephron which helps increase the reabsorption of water and certain ions. In the thin descending limb, water is very permeable and is reabsorbed due to the existing concentration gradient in the medulla.
What is the role that genes play in making proteins?
I need answers like asap plz help
15. Which of the following are functions of the exoskeleton? Check all that
apply.
-Protection of internal organs
-Provide for muscle attachment and movement
-Structural support
-Prevention of water loss
Answer:
•Protection of internal organs
•Provide for muscle attachment and movement
•Structural support
The following that are functions of the exoskeleton are:
Protection of internal organsProvide for muscle attachment and movementStructural supportWhat is an exoskeleton?An exoskeleton is an outer skeleton that is present outside the body of some insects and other organisms. The exoskeleton is made up of hard substances like calcium carbonate or chitin protein.
The exoskeleton protects the soft tissues and organs of organisms. They are helpful in saving the organism from predators and other factors of the environment.
The exoskeleton is present in most arthropods. They also help in reducing water loss from the body.
Thus, the functions of the exoskeleton are:
Protection of internal organsProvide for muscle attachment and movementStructural supportTo learn more about exoskeleton, refer to the link:
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You are trying to help a friend sort some specimens in her lab. She collected organisms from a lake and forgot to label the sample with the part of the lake from which they were taken. Please select the item below that is correctly matched with its collection zone.
a. periphyton labeled "open water"
b. phytoplankton labeled "littoral zone"
c. anaerobic bacteria labeled "limnetic zone"
d. zooplankton labeled "limnetic zone"
e. cattails (emergent plants) labeled "profundal zone"
Answer:
D. zooplankton labeled "limnetic zone"
Explanation:
the zone called the limnetic zone is a well lighted and open zone in a body of fresh water such as the lake or the pond. this zone has the plankton in dominance. both the phytoplankton and the zooplankton. plankton play an important role in the food chain.
zooplankton are primary consumers in this limnetic zone. zooplankton consists of rotifers and copecod
Which solution is more diluted? Solution 1:
1000 mL of water
60g of salt
Solution 2:
500 ml of water 60 g of salt
A.Solution 1
B.Solution 2
C.Both solutions have the same concentration
Answer:
the answer is A: solution 1.
Explanation:
A positive control is a sample in an experiment that produces a known result to compare with the test sample after the same treatment. It is used to control for unknown variables and confirms that all your reagents work.
In this case, the positive control is a cell line expressing wild-type CCR5.
Which of the following do you think will be a good positive control for this experiment?
a) T Cell Helper Line
b) Macrophage cell line without CD4
c) Unedited wild type macrophage
d) Edited macrophage
Explanation:
Human immunodeficiency virus type 1 (HIV-1) enters target cells by first binding to the primary receptor CD4 and then to a coreceptor, generally one of the chemokine receptors CCR5 and CXCR4 (4). CD4 binding induces structural changes in the envelope (Env) glycoprotein that form and expose the coreceptor binding site. There are two main interactions between Env and coreceptor (13, 14, 25, 50, 51): the base of the third variable loop (V3) engages the N terminus of the coreceptor, while the crown of the V3 loop that includes the highly conserved GPGR/Q arch motif binds to the extracellular loops of the coreceptor, with the second extracellular loop of the coreceptor being particularly important (16, 25, 35, 48, 62). Although some HIV-1 strains are able to use a variety of different G protein-coupled receptors to gain entry into CD4+ cell lines, the great majority of these viruses use CCR5 and/or CXCR4 as coreceptors to infect primary cells (3, 4, 10, 23, 47, 66). CCR3, GPR15, APJ, and FPRL-1 are among the most frequently used alternative coreceptors when overexpressed on cell lines (11, 26, 43, 47, 57). Rare cases of HIV-1 strains that are able to use FPRL-1 and GPR1, but not CCR5 or CXCR4, have been reported (57); however, their in vivo relevance remains unknown.
To characterize the biological processes underlying HIV/simian immunodeficiency virus (SIV) transmission, we recently developed an experimental strategy that permits the identification, enumeration, and molecular cloning of transmitted/founder (T/F) viruses (28, 53). This strategy, which employs single-genome amplification (SGA) and direct amplicon sequencing of HIV/SIV RNA or DNA from the plasma or infected cells, makes it possible to infer the nucleotide sequence of the viral strain(s) that initiated productive infection weeks earlier (1, 28, 29, 37, 53, 58, 67). An important prediction of this approach has been that inferred T/F viruses are fully functional and encode all proteins necessary to establish a new infection. Indeed, this prediction has been borne out in numerous studies, which have shown that T/F viral genes as well as full-length genomes are biologically active. Sets of T/F Envs have been shown to mediate efficient virus entry in single-round infection assays, and they invariably use CCR5 as a coreceptor (28, 34). Similarly, T/F infectious molecular clones (IMCs) of HIV-1, SIVmac and SIVagm all produce replication competent virus that grow to high titers in primary CD4+ T cells (22, 38, 54).
MATERIALS AND METHODS
Amplification of the HIV-1 env gene. Serial plasma samples collected from an acutely infected plasma donor, ZP6248, were purchased from ZeptoMetrix. A total of seven plasma samples were collected between 12 February and 9 March 1997, and viral loads (VLs) were determined by the COBAS Amplicor HIV-1 monitor test.
Sequence analysis. All SGA amplicons were sequenced directly by cycle sequencing and dye terminator methods using an ABI 3730xl genetic analyzer (Applied Biosystems, Foster City, CA). Individual sequences were assembled and edited using the Sequencher program 4.7 (Gene Codes, Ann Arbor, MI). The env sequences were aligned using CLUSTAL W (60), and manual adjustment for optimal alignment was done using MASE (20).
Osmosis is the movement of _____________________ from an area of high concentration to low concentration
A) salt
B)water
C)sodium
D) sugar
Answer:
B) Water
Explanation:
Osmosis is the movement of water from an area of high concentration to an area of low concentration across a semi permeable membrane
Bear in mind the biological definition of a species and also the appearance and distribution of the named populations of Ensatina. Which populations could be considered a species separate from E. e. eschscholtzii?
Answer:
E.e. oregonesis
E.e. platensis
E.e. xanthoptica
E.e. croceater
E.e. eschscholtzii
E.e. klaubori
Explanation:
The species mentioned above are probably separate species from E.e. eschscholtzii, which arose through ring speciation that occurs when a species is geographically distributed in a circular pattern. After this distribution, geographic isolation occurs, causing individuals in each different region to evolve differently, becoming other species, even reaching the point where it is not possible to cross them.
Basic needs. Living things have basic needs in order to survive. Plants and animals have like needs. How they use the things required for life can be a little different. Can you drag these phrases to the correct column?
Answer:
is bvasic living thing ok so obiously the answaer is c because it always is ((((((((((((((((answer c)))))))))))))))))))))))
ok so the looooongest word that most people kno is . but thats actually not that long to some people that kno long words so here is the longezt word in the wold, supenemendeddentenilisitationsentinalizinilitioninitialalizedcaliflagiliciousinitialdistintialidocioloassociationlationsensationinitiliationilitisintialidocious. so theres your answer ok an extremly long word for your game (use ok) accountiticationmicjationmasonyaynitiationpronoutiationnaysonnitiationassociationassistiation is still normal length you could say its used commonly around the world and in sentences/essays/paragraphs
Explanation:
write a short essay (not more than 5 sentence ) on how you think life began on earth
Answer:
The earliest known life-forms are putative fossilized microorganisms, found in hydrothermal vent precipitates, that may have lived as early as 4.28 Gya (billion years ago), relatively soon after the oceans formed 4.41 Gya, and not long after the formation of the Earth 4.54 Gya.
Explanation:
in monohybrid cross between a pure breed plant that produces blue flowers (BB)and a pure breed plant that produces white flowers.The f1 generation produces only blue flowers. By means of a labelled cross diagram,state the type of flower you will expect if the f1 generation is self pollinated
Answer: If the F1 generation is self-pollinated, 75% of the flowers will be blue, while 25% will be white.
Explanation:
Monohybrid cross between blue and white: BB x bbThe cross produces 100% Bb --> blue is dominant, so all the flowers will be blue. This is the F1 generation.If F1 is self-pollinated, it will be Bb x Bb.The cross will produce 25% BB, 50% Bb, and 25% bb.Since blue is dominant, 75% of the flowers will be blue, while 25% will be white.Pictures:
The first picture is the BB x bb cross.The second picture is the Bb x Bb cross.I don't know why the pictures are appearing sideways. If you click the rotate button at the top right of the pictures, you can turn them.