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3 years ago

When an atom becomes an ion does its mass number change?

1 answer:

8 0

Its mass number does not change because the atom is losing or gaining electrons, so the change is almost not measurable because the electrons weigh so little.

In other words: its mass number does not change

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Indicate the peptides that would result from cleavage by the indicated reagent: a. Gly-Lys-Leu-Ala-Cys-Arg-Ala-Phe by trypsin b.

Ilia_Sergeevich [38]

Answer:

a. Gly-Lys + Leu-Ala-Cys-Arg + Ala-Phe

b. Glu-Ala-Phe + Gly-Ala-Tyr

Explanation:

In this case, we have to remember which peptidic bonds can break each protease:

-) Trypsin

It breaks selectively the peptidic bond in the carbonyl group of lysine or arginine.

-) Chymotrypsin

It breaks selectively the peptidic bond in the carbonyl group of phenylalanine, tryptophan, or tyrosine.

With this in mind in "peptide a", the peptidic bonds that would be broken are the ones in the "Lis" and "Arg" (See figure 1).

In "peptide b", the peptidic bond that would be broken is the one in the "Phe" (See figure 2). The second amino acid that can be broken is tyrosine, but this amino acid is placed in the C terminal spot, therefore will not be involved in the hydrolysis.

3 0

3 years ago

The ________________and ______________ of magma cause igneous rocks to form.

LekaFEV [45]

Answer:

The solidifying/cooling and crystallizing of magma causes igneous rocks to form.

6 0

3 years ago

What is one benefit and one limitation of comparative investigations

Ivan

1. Seeing broader picture: determining gray areas, overlaps, and exclusions, biases, the primary focus.

2. Bias. Sources may have hidden agenda, personal discrimination conscience or unconscious and a limited view of the short term, long term effects.

5 0

3 years ago

Aside from soap, what other agents can homogenize immiscible solutions? What is the difference between fats and oils? Why should

dolphi86 [110]

Answer:

Agents that can homogenize immiscible solutions are milk , lotion , glue , paint ,alcohol etc.

The primary difference between fats and oils is that, whereas oils are generally derived from plants, fats are usually derived from animals.
Eating too much of the wrong kinds of fats will increase unhealthy LDL cholesterol of decrease healthy HDL cholesterol, such as saturated and trans fats.
Your risk of high blood pressure, arterial hardening (atherosclerosis), heart attack and stroke may be enhanced by the imbalance of fats and oils.
Among the doctor and the patient , the patient's health is deteriorating.

To minimize the intake of fats and oils by suggesting them simple ways-

Eat more vegetables and fruits.
Stop cream and cheese sauces, or use low-fat milk and cheese to make meals.
Instead of butter or margarine, try cooking with herbs , spices, lemon juice, etc.
Try cooking with herbs, spices, lemon juice, etc., instead of butter or margarine.
Beware of confectionary foods, such as chocolate or pastry dishes and crisps. These are very high in fat instead consider swapping for a more balanced snack or restricting portion sizes.

Explanation: FATS -: Fats are usually derived from animals. Fats contain a larger proportion of fatty acids that are saturated. Fats at room temperature are solid.

OILS - Oils at room temperature are liquid. From plants, oils are extracted. A greater proportion of unsaturated fatty acids are found in oils.

5 0

3 years ago

HELPPPP ASAP!!! Plzzz

Ad libitum [116K]

Answer:

420 miles

Explanation:

From the question given above, the following data were obtained:

Time = 3.5 hours

Speed = 120 mi/h

Distance =?

Speed is defined as the distance travelled per unit time. Mathematically, it is expressed as:

Speed = distance / time

With the above formula, we can obtain the distance travelled by the plane as follow:

Time = 3.5 hours

Speed = 120 mi/h

Distance =?

Speed = distance / time

120 = distance / 3.5

Cross multiply

Distance = 120 × 3.5

Distance = 420 miles

Thus, the distance travelled by the plane is 420 miles

6 0

3 years ago