Answer:
Three items that are unique to RNA are as follows:
2. Single-stranded.
3. Contains the nitrogen base Uracil in place of Thymine.
4. Backbone contains the sugar ribose.
Explanation:
Answer:
Explanation:
Step 1: Generating a Proton Motive Force
The hydrogen carriers (NADH and FADH2) are oxidised and release high energy electrons and protons
The electrons are transferred to the electron transport chain, which consists of several transmembrane carrier proteins
As electrons pass through the chain, they lose energy – which is used by the chain to pump protons (H+ ions) from the matrix
The accumulation of H+ ions within the intermembrane space creates an electrochemical gradient (or a proton motive force)
Step Two: ATP Synthesis via Chemiosmosis
The proton motive force will cause H+ ions to move down their electrochemical gradient and diffuse back into matrix
This diffusion of protons is called chemiosmosis and is facilitated by the transmembrane enzyme ATP synthase
As the H+ ions move through ATP synthase they trigger the molecular rotation of the enzyme, synthesising ATP
Step Three: Reduction of Oxygen
In order for the electron transport chain to continue functioning, the de-energised electrons must be removed
Oxygen acts as the final electron acceptor, removing the de-energised electrons to prevent the chain from becoming blocked
Oxygen also binds with free protons in the matrix to form water – removing matrix protons maintains the hydrogen gradient
In the absence of oxygen, hydrogen carriers cannot transfer energised electrons to the chain and ATP production is halted
protein
glycogen
lactic acid
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51:24
If a person were fasting and hadn't eaten for several days in a row, which source of energy would the body use as a
last resort?
During fasting, the body uses glycogen, lipids, and protein as sources of energy.
When a person is fasting and hasn't eaten for several days in a row, the body relies on stored energy sources. The body first depletes its glycogen stores, which are stored in the liver and muscles, and then moves onto using fatty acids from lipids as a source of energy. Once the fat reserves are depleted, the body will turn to using protein as a last resort for energy.
Heredity refers to the process in which DNA is transmitted from parent to offspring, determining trait inheritance. DNA contains the genetic information that informs the traits of the offspring.
The key feature of living organisms that is best described as the transmission of DNA from parent to offspring is called heredity. Heredity is a fundamental biological process that refers to the passing on of genes from one generation to another. Within this process, DNA plays a crucial role as it contains the genetic material that determines the traits of an offspring. For example, you might have the same eye color as your mother because she passed on the specific sequence in her DNA that determines eye color
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#SPJ2
b. contraction of the internal intercostals muscles.
c. contraction of the diaphragm.
d. increase in atmospheric pressure.
e. increase in CO2 in the blood
Answer:
The correct answer is option a. "recoil of the lungs".
Explanation:
Normal respiration is passive, which means that no energy is needed to release the air from the lungs. Passive respiration is preceded by the recoil of the lungs that happens without any effort because of the elasticity of the lungs tissue. After inspiration, the diaphragm and intercostal muscles relax and the thoracic cavity and lungs decrease in volume. This causes that the interpulmonary pressure rises above atmospheric pressure, creating an air pressure gradient that put the air out of the lungs without the need of energy.