BIOLOGY COLLEGE

Which statement best describes the role of the nucleus in a cell?The gate at a factory keeps out unwanted cars.
The elevator at a factory moves materials around the building.
The boss at a factory gives out orders and directions.
The boxes at a factory are used to ship materials to customers.
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Which statement best describes the role of the nucleus in - 1

Answers

Answer 1
Answer:

Answer:

The boss at a factory gives out orders and directions.

Explanation:

The nucleus is an organelle that is enclosed by nuclear membrane and carry genetic material in eukaryotic cells.

The role of nucleus is to monitor and control the functioning of different activities such as growth and metabolism of the cell and also transfers the hereditary information. Likewise boss of a factory gives out orders and directions to regulate the factory properly.

Hence, the correct option is "The boss at a factory gives out orders and directions."

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Can someone help me i'm stuck on this question.play an important role in an ecosystem, breaking down dead organisms and recycling the nutrients.

Decomposers

Producers

Heterotrophs

Answers

Decomposers  get nutrients and energy by breaking down dead organisms and animal wastes. Through this process, decomposers releasenutrients, such as carbon and nitrogen, back into the environment. These nutrientsare recycled back into the ecosystem so that the producers can use them.
Decomposers play an important role in an ecosystem, breaking down dead organisms and recycling the nutrients.

Natural selection is a common mechanism for proposing how evolution occurs. Which statements describe how natural selection works over time in a population within an ecosystem? Select ALL that apply.

Answers

Answer:A and D

Explanation: Because that’s what US Test Prep said was right.

It is often possible to predict the number of times a membrane protein crosses the membrane by determining how many short sequences of hydrophobic amino acids are present in the amino acid sequence of the protein. Choose the correct explanation. It is often possible to predict the number of times a membrane protein crosses the membrane by determining how many short sequences of hydrophobic amino acids are present in the amino acid sequence of the protein. Choose the correct explanation. a. Sequences of hydrophilic amino acids are the segments of the protein that span the membrane.
b. Sequences of hydrophobic amino acids are the segments of the protein that span the membrane.
c. Sequences of hydrophobic amino acids are the segments of the protein that dissolve in the membrane.
d. Sequences of hydrophilic amino acids are the segments of the protein that dissolve in the membrane.

Answers

Sequences of hydrophobic amino acids are the segments of the protein that span the membrane. Thus option B is correct.

What are the levels of protein structure?

The Primary structure of proteins is the linear structure of amino acids formed by Covalent, peptide bonds to form primary structure of protein.

Secondary structure protein defined as the folded structures formed by hydrogen bonding among the amine and carboxyl group of the peptide chain and it finally form polypeptide then into protein.

These secondary structure present in two structure such as α – helix which form a polypeptide chain by hydrogen bonding and twisting into a right-handed screw with the -NH group of each amino acid residue.

The β – pleated sheet form of protein are stretched out ,laid side by side together by intermolecular hydrogen bonds.

Learn more about protein, here:

brainly.com/question/14652022

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Correct answer is B



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3. During which stage of the cell cycle would a cell contain the least total amount of DNA?

Answers

Answer:

I think meiosis because it becomes 1 pair of chromosomes, compared to 2 pairs during other stages

Explanation:
S phase is the period during which DNA replication occurs. The cell grows

For each nonhuman species, what percent of its amino acids are identical to the human sequence of

Answers

The percentage of its amino acids that’s identical to human sequence is 34.789

The peroneus brevis muscle attaches to the dorsal part of the of the most lateral metatarsal bone. What kind of mechanical machine is this musculoskelatal arrangement? Shortly explain its mechanism and indicate what are the advantages of such an arrangement?

Answers

Answer:

The answers are Tubercle and keeping the body balance over the feet, the hability of standing, avoid the body to fall, ankle plantarreflexion and foot evertion

Explanation:

The peroneus brevis muscle is located on the lateral side of the leg and it is a fusiform, and, short muscle, that becomes a tendon and passes behind the lateral malleolus. The tendon is inside a synovial sheath. It passes foward and  downward into a groove above the peroneal tubercle on the calcaneous. The distal attachment of the peroneus brevis is the tubercle on the lateral side of the base of the first metatarsal. The mechanism is responsible for foot evertion, ankle plantarreflexion, because the tendon's position, which pulls the foot in that direction.  The advantange is that this mechanism garantees important functions such as stops a sideway sway when a person is standing, controlling the body from falling to the opposite side when standing on one leg (keeps the body balanced)

Controlling the position of the foot and stopping the foot from being inverted . Sometimes the foot can over invert causing weight to be applied to the lateral surface of the foot.

Answer:

the peroneus longus (also known as fibularis longus) is a superficial muscle in the lateral compartment of the leg, and acts to evert and plantarflex the ankle.

Explanation:
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