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MAVERICK [17]
3 years ago
8

HELLLLPPPPPPP MEEEEEEE

Biology
2 answers:
trapecia [35]3 years ago
8 0
Number 1 is the answer
Gelneren [198K]3 years ago
7 0

Answer:

the first one

Explanation:

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Enzymes only work with specific substrates because each substrate
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<span>it has a specific activation site for enzyme attachment</span>
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Which cells are not formed during meiosis? A somatic cells B gametes C sex cells D sperm cells
katovenus [111]

Answer: i think its A somatic cells

Explanation:

3 0
3 years ago
-<br> Calculate the molar mass of a gas that has a density of 1.55g/L.
VLD [36.1K]

Answer: 39.86 g/mol

Explanation:

Assuming this gas is at a pressure of 0.99 atm and a temperature of 37 \°C+273.15=310.15 K, we can solve this problem with the Ideal Gas Law equation:

P.V=n.R.T  (1)

Where:  

P=0.99 atm is the pressure of the gas  

V is the volume of the gas  

n the number of moles of gas  

R=0.0821 \frac{atm.L}{mol.K} is the gas constant  

T=310.15 K is the absolute temperature of the gas in Kelvin

On the other hand, we know the density \rho=1.55 g/L is given by a relation between the mass m and the volume V:

\rho=\frac{m}{V} (2)

Then, the mass is:

m=\rho V (3)

Another important fact here is that the molar mass M_{mass} of an element is given by a relation between the mass of that element and the number of moles n it contains:

M_{mass}=\frac{m}{n} (4)

Isolating n:

n=\frac{m}{M_{mass}} (5)

Substituting (5) in (1):

P.V=\frac{m}{M_{mass}}.R.T  (6)

Substituting (3) in (6):

P.V=\frac{\rho V}{M_{mass}}.R.T  (7)

Isolating M_{mass}:

M_{mass}=\frac{\rho V}{PV}RT (8)

Simplifying:

M_{mass}=\frac{\rho}{P}RT (9)

Solving with the given data:

M_{mass}=\frac{1.55 g/L}{0.99 atm}(0.0821 \frac{atm.L}{mol.K})(310.15 K) (10)

Finally:

M_{mass}=39.86 g/mol This is the molar mass of the gas

6 0
3 years ago
The predatory bacterium Bdellovibrio bacteriophorus drills into a prey bacterium and, once inside, digests it. In an attack upon
vagabundo [1.1K]

The correct sequence of structures penetrated by B. bacteriophorus on its way to the prey's cytoplasm is capsule, lipopolysaccharide membrane, peptidoglycan, phospholipid membrane.

What is  cytoplasm?

The gelatinous liquid that makes up a cell's interior is called cytoplasm. It is made up of different organic compounds, salts, and water. The cytoplasm is kept apart from some internal organelles, like the nucleus and mitochondria, by membranes.

Therefore,

The correct sequence of structures penetrated by B. bacteriophorus on its way to the prey's cytoplasm is capsule, lipopolysaccharide membrane, peptidoglycan, phospholipid membrane.

To learn more about peptidoglycan from given link:

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