A chemical reaction occurs. Which of the following would indicate that energy is transformed during the reaction? A. light is produced B. heat is produced C. an electrical charge is produced D. all of these

Answer:

it is Africa

Explanation:

When a piece of liver is dropped into hydrogen peroxide, the peroxide bubbles vigorously as the hydrogen peroxide decomposes into water and oxygen. This suggests the liver contains an enzyme that breaks down hydrogen peroxide. Thus, the correct option is C.

What is Catalase?

Catalase is a common enzyme which is found in nearly all living organisms which are exposed to oxygen gas. Catalase is a key enzyme which uses hydrogen peroxide, a nonradical Reactive Oxygen Species, as its substrate. Catalase enzyme is responsible for the neutralization through decomposition of hydrogen peroxide, thereby maintaining an optimum level of the molecule in the cell system which is also essential for the cellular signaling processes.

Catalase is an enzyme which causes or speeds up a reaction without being affected during the reaction. The enzyme catalase speeds up the breakdown of hydrogen peroxide into water and oxygen gas.

Therefore, the correct option is C.

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Answer: C

Explanation:

Catalyst is one enzyme from liver that breaks down harmful hydrogen peroxide into oxygen gas and water

Answer:

Explanation:

The cell membrane separates the cell from the outer environment. The extracellular fluid contains the sodium ions (Na+), chloride ions (Cl-), while intracellular fluid contains potassium (K +) and negative anions.

The potential difference arises when the membrane is selectively permeable to some ions. The resting potential is -70mV.  

When the neurons get excited, the sodium ions start to enter by sodium channels.  

Now there are more positive ions inside the cell membrane. It disturbs the resting potential i.e. -70mV. This stage is known as depolarization.

When the inside environment of the cell is more positively charged, the potassium ions start to move out of the cell. It goes out by the voltage-gated channels. Thus resting stage is maintained and it is known as repolarization.

But the initial stability of the cell membrane has to be maintained. To restore the resting stage, the sodium ions start to move out of the membrane and potassium ions enter into the cells again. This is an active transport and has done by the Na+ - K+ pump. Here 3 sodium ions move out and 2  potassium ions pumped into the cell through the plasma membrane.  

Thus the resting potential regains. The potassium ions come back into the cells against the concentration gradient and ATP provides the energy for this phenomena.

Answer:

False.

Explanation:

Neuron or nerve cell may be defined as the structural and functional unit of the nervous system. The neurons conduct the nerve impulse and helps in the transmission of signals.

The depolarization of the cell occurs due to the influx of sodium ions into the cell. For the cell membrane to be in resting potential, the potassium ions moves inside the cell from outside the environment and not out of the cell of the organism.

Thus, the correct answer is option (b).

Ans.

Embryogenesis or embryonic development is defined as a process that involves formation and development of a zygote into embryo. The fertilized egg or zygote undergoes mitotic divisions through cleavage and divides rapidly.

The first stage of embryonic development is known as morula that represents a 16 cells consisting solid ball-like structure. The morula later develops into blastula.

Thus, the correct answer is option C). 'morula.'

If osteoclasts are more active than osteoblasts, bones will become - C. Osteopenic.

Osteoblasts which synthesize the bone matrix and coordinate the mineralization and osteoclasts which are responsible for the dissolution and absorption of bone; are two major types of cells present in bones.

• Osteoblasts are defined as bone-forming cells that help in bone mineralization.

• Osteoclasts are responsible for bone resorption and cause the breakdown of bones.
• Osteopenia is a condition that begins as you lose bone mass and your bones get weaker.
• A person with osteopenic has slightly less dense bones than normal

Thus, If osteoclasts are more active than osteoblasts, bones will become - C. Osteopenic.

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Answer:

The answer is C) osteopenic

Answer:

A. Preventing fish from moving along a river.

Explanation:

1. Dams create barriers and trap the water that builds up behind it. This prevents fish from moving along the river as there's a barrier in place and is just overall harder for the fish to move freely along a river because of it.

2. It's the only negative option as the others are all positive outcomes, while the question asks for a negative outcome instead.

Hope this helps!