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Nat2105 [25]
3 years ago
7

Help me pls ASAP !! (Extra points)

Biology
1 answer:
alexandr402 [8]3 years ago
7 0
The Answer should be A
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The electron transport chain is composed primarily of what biomolecule?
lys-0071 [83]

The correct answer is proteins.

The oxidative phosphorylation in the eukaryotes takes place within the mitochondria with the help of electron transport chain. The main objective of the electron transport chain is to accumulate enough amount of protons in the intermembrane space so that there will be a concentration gradient which would help in the production of ATP.  

The electron transport chain comprises of various molecules, but majorly the proteins, which are situated in the inner membrane of the mitochondria.  


3 0
3 years ago
ASAP please thanks
MrMuchimi

Answer: pretty sure it’s B.

Explanation: The salivary glands create a digestive juice called salivary amylase that starts to break down or hydrolyze the starch that is in the bread of the chicken sandwich when the chicken sandwich first reaches the mouth. It would be digested in the amylase in the stomach

6 0
3 years ago
Write a brief description of the Nervous system.
bazaltina [42]
The nervous system coordinates it's actions by sending signals throughout the body
6 0
3 years ago
!!!!!How do radioactive elements help scientists establish how old rocks and fossils are?!!!!
MAVERICK [17]

Answer:

I will give a hypothesis. Just like a tree, when you cut a tree by its trunk, you will the rings. The rings around it represents the tree's age. So when you cut rock, the pores in the rock determine whether it is an old rock or a fossil rock.

Explanation:

The reason is, if it is limestone and it is an old rock, the pores will be slightly big and if the limestone is a fossil rock, then the pores will be bigger due to leaching or denaturing of the minerals in the rock through the ages.

6 0
3 years ago
The cardiac reserve refers to the maximum percentage of increase in cardiac output that can be achieved above the normal resting
skelet666 [1.2K]

Answer:

300% - 400%

Explanation:

The cardiac reserve is in the range of 300 to 400 percent (300% - 400% ) in normal young adults, while this percentage can be increased to 600% in trained athletes

4 0
3 years ago
Read 2 more answers
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