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2 years ago

BRAINLIESTTT ASAP!! PLEASE HELP ME :)

Biology

2 answers:

dem82 [27]2 years ago

4 0

The nucleus of an atom contain protons and neutrons, which make up most of the mass of an atom.

The answer would be 2 and 3 ( 2nd answer choice)

Zigmanuir [339]2 years ago

4 0

Answer: Option (b) is the correct answer.

Explanation:

In an atom there will always be three sub-atomic particles which are protons, neutrons and electrons.

And, inside the nucleus of an atom, there will be only protons and neutrons. Whereas electrons revolve around the nucleus of an atom.

Protons have a positive charge, neutrons have no charge and electrons have a negative charge.

Mass of these subatomic particles are as follows.

Proton : $1.672623 \times 10^{-27} kg$

Neutron : $1.674929 \times 10^{-27} kg$

Electron : $9.109390 \times 10^{-27} kg$

Thus, we can conclude that out of the given options locations 2 and 3 are likely to have subatomic particles with the greatest mass.

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Which of the following cellular environments is conducive to the formation of disulfide bonds within or between proteins? Choose

STatiana [176]

Answer:

Rough endoplasmic reticulum and Mitochondria.

Explanation:

Disulfide bonds are known as covalent bonds. They are formed by the oxidation of 2 cysteines and these bonds can provide stability to proteins. These bonds mainly formed in intermembrane space of mitochondria and cellular compartments outside the cytoplasm endoplasmic reticulum. Both of these organelles present in an oxidation state providing an atmosphere for disulfide bond formation.

Cytoplasm and Nuclei mostly exit in reducing state because of the existence of disulfide reductase which is reducing the disulfide bonds between the cysteine residue to thiolate state. So, the disulfide bond formation will not happen.

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2 years ago

1. Meiosis in Brennan's Mom's ovaries

Y_Kistochka [10]

Answer:

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Explanation:

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2 years ago

In fast-twitch oxidative-glycolytic fibers, their rapid increases in force rely on the ________ activity where rapid relaxation

Kitty [74]

Answer:

1. myosin ATPase

2. Ca2+-ATPase

Explanation:

ATPase activity of myosin head hydrolysis ATP and energize the myosin head. The energized myosin head forms cross bridges to facilitate the power stroke of muscle contraction. The fast-twitch oxidative-glycolytic fibers have the ability to produce ATP by aerobic respiration.

These fibers have the ATPase in their myosin heads that hydrolyze ATP three to five times faster than the myosin ATPase in slow fibers. This ensures the faster speed of contraction of these fast-twitch muscle fibers.

During their relaxation, Ca2+ ATPase pumps the calcium ions back to the sarcoplasmic reticulum. As the level of Ca2+ ions in the sarcoplasm decreases, calcium ions are released from troponin. Tropomyosin is allowed to cover the myosin-binding sites on actin and the muscle fiber relaxes faster.

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2 years ago

A manager wanted to test whether the amount of noise in a clothing factory affected how

katrin2010 [14]

Answer:

When seeking to determine the number of shirts made by employees subjected to noise with and without the use of headphones, the dependent variable is the number of shirts made by the employee.

Explanation:

In a study or research, the dependent variable is the result of the intervention on the independent variable, which can be modified. In the case presented, the dependent variable is the quantity of shirts made by the employees, the number of which is measured at the end of the study.

It is expected that those employees who block the noise using headphones produce a greater number of shirts than those exposed totally or partially to noise.

For the other options:

The amount of noise. This can modified by the use or not of headphones and is the independent variable, subject to modification.
The type of music the employees listen to while they work. Does not represent dependent or independent variable.
The amount of training employees need. It is not the variable being studied.

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3 years ago

Which formation is the result of glacial erosion?

lana66690 [7]

Answer: Fjords, glaciated valleys, and horns are all erosional types of landforms, created when a glacier cuts away at the landscape. Other types of glacial landforms are created by the features and sediments left behind after a glacier retreats.

Explanation:

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2 years ago

Read 2 more answers