Which statement most accurately describes what happens to proteins that lack an ER signal sequence?

They are inserted into the ER membrane but do not enter the ER lumen.
They are inserted into the plasma membrane.
They bypass the ER but enter the Golgi apparatus.
They are released into the cytosol.

Answer:

D. Metaphase. It is the third of the five phases of biological cell division, or more specifically, the division of what is inside that cell's nucleus.

Explanation:

The M-phase is the most dramatic period of the cell cycle, involving a major reorganization of virtually all cell components.

yeasts and bread molds. The answer is C

The correct answer is: a. using a photographic negative to make a positive image  

A negative image is a total inversion of positive image (normal image). Negatives are normally used to make positive prints.

This can be compared to copying mechanism of DNA-replication of DNA in which one strand of DNA (e.g. 3’-5’ orientation) is used as a template to make new strand with opposite orientation (5’-3’).

The copying mechanism of DNA is most like using a photographic negative to make a positive image.

The correct option is A .

The copying mechanism of DNA is most like using a photographic negative to make a positive image. In DNA replication, the two strands of the double helix separate, and each strand serves as a template to synthesize a new complementary strand. This process results in two identical DNA molecules, similar to how a photographic negative is used to produce a positive image with identical features.

Just like the negative contains information to create the positive image, each DNA strand contains the genetic information necessary to create the complementary strand during replication.

Hence , A is the correct option

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Answer:

d. an onblique muscle layer

Explanation:

The alimentary canal has four main layers:

Mucosa (innermost layer which surrounds the lumen), submucosa (connective tissue with blood vessels, lymphatics, and nerves), muscular layer, serosa ( outermost layer of connective tissue).

Muscular layer is subdivided into:

• the inner- arranged in circular rings, prevents food from travelling backward  

•  outer layer- arranged longitudinally,  shortens the tract.

The stomach has an extra layer called inner oblique muscular layer (churning function).

The correct answer is: B) continuous transcription of the structural gene controlled by that regulator

A regulatory gene is gene that encodes for a protein, such as a repressor (or activators) that controls the transcription of another gene or group of genes.

The regulatory gene of a repressible operon encodes for the repressor that inhibits gene transcription. So, when that repressor isn’t active, transcription occurs continuously.

A mutation that deactivates the regulatory gene of a repressible operon in an Escherichia coli cell would result in continuous transcription of the structural gene controlled by that regulator.

If the regulatory gene of a repressible operon in an Escherichia coli cell is deactivated due to a mutation, the result would be continuous transcription of the structural gene controlled by that regulator. In a repressible operon, the regulatory gene codes for a repressor protein that binds to the operator region, blocking transcription of the structural gene. However, when the regulatory gene is deactivated, the repressor protein is not produced, and the structural gene is continuously transcribed.

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Answer: 0%  percentage of krebs cycle enzymes are synthesized on membrane-bound ribosome

An educated guess is an hypothesis

The answer is D. . . . . . . . . .

The sentence 'The dod idn ote at' most resembles a frameshift mutation. A frameshift mutation happens when the reading frame of a gene is shifted, resulting in a completely different translation, similar to the shift and change in meaning in this sentence.

The variation most like a frameshift mutation is "The dod idn ote at." In biology, a frameshift mutation is a type of mutation involving the insertion or deletion of a nucleotide in a DNA sequence that is not divisible by three. Frameshift mutations result in a completely different translation from the original because the reading frame of the gene is moved. This change is similar to what happens in the given sentence, where every word has had a letter moved, shifting the entire sentence and changing the meaning.

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Answer:

The question lacks options, the options are:

A) Water turns to steam when boiled over a Bunsen burner.

B) Carbon combines with oxygen to form carbon dioxide gas.

C) Water breaks down into hydrogen and oxygen gases.

D) Limestone breaks down into lime and carbon dioxide when heated.

The answer is A

Explanation:

Changes occur from one state of matter to another. This change can either be physical or chemical. A physical change is a change in which no new substances are formed as products and it can be reversed to form the reactants again. Chemical change, on the other hand, forms new substances as products by the rearrangement of chemical bonds in the resulting molecule.

In the case of this question, water turning into steam when heated, a process called evaporation is an example of physical change because water, which is a liquid is just changing its state to gaseous (steam). Hence, no new substance is formed. The steam can easily be reversed back to water via CONDENSATION.

In the other options, new products are formed either by breaking the chemical bonds between molecules or rearranging them. Hence, options B, C and D are examples of chemical change.

B.) The cell wall of plants & fungi, while both carbohydrates, are chemically distinct.

Answer:

Due to different chemical composition of plant and fungal cell wall, presence of cell wall is not considered as being the shared feature between these two groups.

Explanation:

Both plants and fungi have cell wall. The principle component of plant cell wall is cellulose while the fungal cell wall is mainly made up of chitin. If the presence of cell wall was a shared feature, both plants and fungi should have similar chemical composition of cell wall. Hence, it is not taken as shared character for these two groups of organisms.

Answer:

C) protein possesses a signal for localization within the Golgi apparatus.

Explanation:

Protein targeting or sorting is a process by which synthesized proteins are transported to their appropriate localizations in the cell or outside it. Proteins can be targeted to the inner space of an organelle (such as Golgi apparatus or endoplasmic reticulum) or its membrane, plasma membrane, or to exterior of the cell via secretion.  

Usually, protein contains signal sequence on the N terminus that is involved in destination targeting.

The myelin sheath insulates the axon

The answer is; E

CDK is only active when they bind cyclin. In the CDK-cyclin complex, they are able to phosphorylate their substrates on serines and threonines. Particular CDKs are specific to their cell cycle phase. CDKs have maintained more or less constant levels in a cell and the cyclin levels are what fluctuate.

Cdk, or Cyclin-Dependent Kinase, is a protein that is maintained at constant levels throughout the cell cycle and requires cyclin to become catalytically active. It is a key regulator of the cell cycle.

The protein that is maintained at constant levels throughout the cell cycle and requires cyclin to become catalytically active is Cdk (Cyclin-Dependent Kinase).

Cdks are a type of protein kinase and are key regulators of the cell cycle. They are present in the cell at constant concentrations and their activity is controlled by the synthesis and degradation of their regulatory subunits, the cyclins.

As cyclin levels increase, the Cdk-cyclin complexes are formed and become active, which helps push the cell through different stages of the cell cycle.

The protein that requires cyclin to become catalytically active and is maintained at constant levels throughout the cell cycle is protein kinase.

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Answer:

Its larvae have cilia that they use for feeding and locomotion.

Explanation:

Flatworms or platyhelminths are simple organisms with bilateral symmetry. Their body is unsegmented and soft with different shapes. Flatworms don’t have body cavity, have no specialized circulatory and respiratory organs. There are four main groups of them: Turbellaria, which are mostly non-parasitic animals such as planarians, Cestoda, Trematoda and Monogenea (all three of them are parasitic groups).

If the discovered species has larvae that use cilia for feeding and locomotion, it is most likely more closely related to flatworms. Rounded Worms do not possess this characteristic.

The characteristic that would enable you to argue that a newly discovered species is more closely related to a flatworm than to a roundworm is if its larvae have cilia that they use for feeding and locomotion. This characteristic is typically found in flatworms, whereas roundworms do not have cilia. Flatworms are also known for their lack of a well-developed coelom, unlike roundworms that do have it. The presence of a cuticle that it sheds in order to grow is another characteristic of roundworms, not flatworms. Lastly, simply having a worm-like shape does not necessarily indicate relation to either flatworms or roundworms, as many various species share similar shapes.

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The conversion of light energy to chemical energy first occurs when electrons are transferred from excited photopigments to an electron carrier in a photosystem (pigments together with proteins organized into complexes and located in the thylakoid membranes of chloroplasts).

The light-dependent reactions is one of the two successive phases that occur during photosynthesis (other is light-independent reactions). The light-dependent reactions use sunlight energy (electromagnetic radiation) to make the energy storage molecule ATP and the reduced electron carrier NADPH. In the light-independent reactions (also called Calvin cycle), CO2 is absorbed and fixed in order to build three-carbon sugars (glyceraldehyde-3-phosphate) and this process is fueled by, ATP and NADPH from the light reactions.

If  crossing over occurs only between two chromatids, these crossover chromosomes produce the recombinant gametes and the remaining two are similar to the parentals.

The answer is a

If crossing over occurs between two chromatids on a single pair of homologous chromosomes, then the number of gametes which will have a recombinant phenotype will be 2 of the 4. Thus, the correct option is C.

Crossing over is a cellular process which takes place during the meiotic division when the chromosomes of the same type in the cell are lined up. When two chromosomes, one from the mother side and one from the father side line up, then some part of the parental chromosome can be switched between the two parents. The two chromosomes contain the same genes, but may have different forms of the genes with them.

If crossing over occurs between any two chromatids which are present on a single pair of homologous chromosomes in the cell, then two out of the four resulting gametes will have a recombinant chromosome and two will have the parental chromosome.

Therefore, the correct option is C.

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Final answer:

The question pertains to mathematically determining the sizes of bird flocks based on their food consumption, where the food percentages and simulated number of birds in the next generation are calculated.

Flock Z: 29.33% x 30 = 8.799 birds, approximately 9 birds.

Explanation:

The question involves calculation of flock sizes and percentages related to their food consumption. The total pieces of food eaten were given, and the student was asked to find the food percentage for each flock, and then calculate the simulated number of birds in the third generation.

For Flock X, with 32 pieces of food eaten, the food percentage is calculated by 32 / 300 = 0.1067, which is 10.67%. For Flock Y, with 180 pieces of food eaten, the food percentage is 180 / 300 = 0.6, which is 60%. For Flock Z, with 88 pieces of food eaten, the percentage is 88 / 300 = 0.2933, which is 29.33%.

To find the simulated number of birds in the third generation, you multiply the food percentage by the total number of birds. Hence, for Flock X: 10.67% x 30 = 3.201 birds, approximately 3 birds. For Flock Y: 60% x 30 = 18 birds. For Flock Z: 29.33% x 30 = 8.799 birds, approximately 9 birds.

By calculating the food percentage eaten by each flock and multiplying it by the total number of birds, we find the estimated population size for the third generation.

To determine the food percentage for each flock, divide the total pieces of food eaten by the flock by 300, which is the total number of pieces of food eaten by all flocks. Then, to simulate the number of birds in the third generation for each flock, multiply the food percentage by 30, the total number of birds.

For example, Flock X ate 32 pieces of food. So the food percentage for Flock X is: (32/300) * 100 = 10.67%. Next, we simulate the number of birds in the third generation for Flock X: 10.67% of 30 birds = 3.20, which we would round to a whole number depending on the context.

Repeat this process for flacks Y and Z to get the simulated number of birds for those flocks in the third generation.

The answer is B) oviduct

Final answer:

The female structure analogous to the male's vas deferens is the oviduct or Fallopian tube, which transports the ovum from the ovary to the uterus. Fertilization typically occurs in the Fallopian tube.

Explanation:

The structure in females that is analogous in function to the vas deferens in males is the oviduct, also known as the Fallopian tube. The vas deferens transports sperm from the epididymis to the urethra in preparation for ejaculation. Similarly, the oviduct is the pathway by which an ovum, or egg, travels from the ovary to the uterus. If fertilization is to take place, it typically happens within the oviduct.

Additionally, it is worth noting that fertilization usually occurs in the Fallopian tube, not in the ovary, uterus, or vagina. The urethra in males is part of both the urinary and reproductive systems, allowing the passage of urine and semen, but in females, the urethra is involved solely with the urinary system.

According to Max Weber, what factor or factors are responsible for social stratification?

B. class, prestige, and power

~Hope this answers your question!~

Max Weber cited class, prestige, and power as the key factors responsible for social stratification, which are interconnected yet distinct elements influencing an individual's social standing. The correct option is: B. class, prestige, and power.

According to Max Weber, the factors responsible for social stratification are class, prestige, and power. Weber's comprehensive theory of social stratification encompassed not only economic positioning but also the dimensions of status and the ability to influence others.

Weber acknowledged that while wealth, power, and prestige frequently go hand-in-hand, they do not always overlap and must be considered as separate yet interconnected factors contributing to an individual's social standing.

i think the answer is

a substance that is naturally found in the brain

Not have kids, adopt them, or maybe find a different dad if her carriers the disease. She should follow normal check ups. She should take 400mg of folic acid to help the spin grow better. A multi-vitamin and some vitamin B would reduce it by 70%

the lowest possible temperature in nature is absolute zero, which defines 0 degrees Kelvin (-273.15 degrees C. or -459.67 degrees F.) If by 'nature' you mean ANYWHERE outside a laboratory, intergalactic space would probably offer the lowest temperatures in the known Universe.

hope this helps :)

The lowest temperature possible in nature is absolute zero. Although it cannot be reached in practice, it is assigned the value of zero on the Kelvin scale.

This temperature is theoretically the lowest possible temperature and is assigned the value of zero on the Kelvin scale. However, in practice, absolute zero cannot be reached, but the lowest temperatures ever recorded in laboratory experiments were 4.5 × 10-10 K and 1.0 × 10-100 K.

Hence the answer is zero.

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This is false, it takes distance into account for brightness

The correct answer is - B. The number and type of plants in an ecosystem determines the number and type of consumers that can live there.

The plants are producers. They are the basis of the ecosystems on Earth. By consuming the plants, the consumers are able to survive and thrive, thus the food chain develops further up to the predators that are consuming other consumers.

The number of plants and the type of plants determines what type and how many species of consumers can live somewhere. The more plants there are, the more food for the consumers, thus there will be more consumers. The higher the diversification of the plants, the higher the diversification of the consumers will be too, as every plant is unique and specialization for consuming it is needed, thus the consumers will evolve into new species in accordance to the food source.

The answer is 2

Medications known as glucocorticoids (prednisone and cortisone, etc). are known to have a side effect that increases blood glucose (sugar) since these drugs promote glucose production in the liver.

The correct answer is: secretin

Secretin is a peptide hormone (produced in the S cells of the duodenum),  that regulates secretions in the stomach, pancreas, and liver. Secretin is secreted in response to acid in the duodenum, so its role is to stimulate duct cells of the pancreas to secrete water and bicarbonate (regulating water homeostasis).  

Secretin is the hormone that stimulates pancreatic secretions.

The hormone that stimulates pancreatic secretions is secretin. Secretin is produced by the duodenum in response to the presence of acid in the stomach. When secretin is released, it stimulates the pancreas to secrete bicarbonate into the small intestine to neutralize the acid. This helps to maintain an optimal pH for digestion in the small intestine.

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Stimulated by the action of the ions on its receptors, the pump transports them in opposite directions against their concentration gradients. ... The sodium-potassium pump carries out a form of active transport—that is, its pumping of ions against their gradients requires the addition of energy from an outside source.

Endocrine. Because insulin is a hormone that are produced in the endocrine gland such as pancreatic gland

20% beacuse adinine always pair with thymine therefore the percentage of adinine and thymine is 20+20 = 40% , thus the remaining 60% is of guanine and cytosine