1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Ludmilka [50]
3 years ago
9

What causes differences in air preassure? ​

Biology
1 answer:
maks197457 [2]3 years ago
5 0

Answer:

Air temperature

Explanation:

These variations in air pressure are due to temperature differences caused by variations in solar energy received at the surface of the earth

You might be interested in
Forces that act in pairs are said to be _____________.
dimulka [17.4K]
The answer is A, stable.
7 0
3 years ago
Animals are <br> a autographs<br> b heterotrophs<br> c prokaryotes<br> d stationary
AVprozaik [17]
The answer is B. Heterotrophs. All animals and fungi are heterotrophs. Hope I helped!
8 0
2 years ago
Read 2 more answers
Inhibition of transcription by lac repressor involves its binding to the promoter
viktelen [127]
Answer:
           
                  The correct option is b (false). 

Explanation:
     
                    As is is cleared from the figure that when lactose is absent, the lac repressor binds tightly to the operator. It gets in RNA polymerase's way and prevent transcription. 

8 0
3 years ago
Read 2 more answers
The enzyme ??? breaks down the sugar ???.
laila [671]

Answer:

huh?

Explanation:

4 0
3 years ago
Read 2 more answers
When oxygen is available,<br>cellular respiration takes place.​
nexus9112 [7]

Cellular respiration is a process that all living things use to convert glucose into energy. Autotrophs (like plants) produce glucose during photosynthesis. Heterotrophs (like humans) ingest other living things to obtain glucose. While the process can seem complex, this page takes you through the key elements of each part of cellular respiration.

Cellular respiration is a collection of three unique metabolic pathways: glycolysis, the citric acid cycle, and the electron transport chain. Glycolysis is an anaerobic process, while the other two pathways are aerobic. In order to move from glycolysis to the citric acid cycle, pyruvate molecules (the output of glycolysis) must be oxidized in a process called pyruvate oxidation.

Glycolysis

Glycolysis is the first pathway in cellular respiration. This pathway is anaerobic and takes place in the cytoplasm of the cell. This pathway breaks down 1 glucose molecule and produces 2 pyruvate molecules. There are two halves of glycolysis, with five steps in each half. The first half is known as the “energy requiring” steps. This half splits glucose, and uses up 2 ATP. If the concentration of pyruvate kinase is high enough, the second half of glycolysis can proceed. In the second half, the “energy releasing: steps, 4 molecules of ATP and 2 NADH are released. Glycolysis has a net gain of 2 ATP molecules and 2 NADH.

Some cells (e.g., mature mammalian red blood cells) cannot undergo aerobic respiration, so glycolysis is their only source of ATP. However, most cells undergo pyruvate oxidation and continue to the other pathways of cellular respiration.

Pyruvate Oxidation

In eukaryotes, pyruvate oxidation takes place in the mitochondria. Pyruvate oxidation can only happen if oxygen is available. In this process, the pyruvate created by glycolysis is oxidized. In this oxidation process, a carboxyl group is removed from pyruvate, creating acetyl groups, which compound with coenzyme A (CoA) to form acetyl CoA. This process also releases CO2.

Citric Acid Cycle

The citric acid cycle (also known as the Krebs cycle) is the second pathway in cellular respiration, and it also takes place in the mitochondria. The rate of the cycle is controlled by ATP concentration. When there is more ATP available, the rate slows down; when there is less ATP the rate increases. This pathway is a closed loop: the final step produces the compound needed for the first step.

The citric acid cycle is considered an aerobic pathway because the NADH and FADH2 it produces act as temporary electron storage compounds, transferring their electrons to the next pathway (electron transport chain), which uses atmospheric oxygen. Each turn of the citric acid cycle provides a net gain of CO2, 1 GTP or ATP, and 3 NADH and 1 FADH2.

Electron Transport Chain

Most ATP from glucose is generated in the electron transport chain. It is the only part of cellular respiration that directly consumes oxygen; however, in some prokaryotes, this is an anaerobic pathway. In eukaryotes, this pathway takes place in the inner mitochondrial membrane. In prokaryotes it occurs in the plasma membrane.

The electron transport chain is made up of 4 proteins along the membrane and a proton pump. A cofactor shuttles electrons between proteins I–III. If NAD is depleted, skip I: FADH2 starts on II. In chemiosmosis, a proton pump takes hydrogens from inside mitochondria to the outside; this spins the “motor” and the phosphate groups attach to that. The movement changes from ADP to ATP, creating 90% of ATP obtained from aerobic glucose catabolism.

7 0
3 years ago
Other questions:
  • The _______ is the smooth, triangular surface where the anterior surface of the scapula faces the ribs.
    14·1 answer
  • According to Darwin, organisms that are best adapted to their ...environment.which phrase is used to summarize this idea
    14·2 answers
  • The chief commanding officer during the Vietnam War was _____. General Calley General McNamara General Westmoreland General Pete
    7·2 answers
  • What is the last stage of protein synthesis, in which amino acids are assembled by tRNA?
    8·1 answer
  • What challenges do scientists who want to study particular genes face
    7·2 answers
  • What type of living organism is the leptaena fossil?
    10·1 answer
  • Why use needle loop to prepare fungi slide? Please, help me
    5·1 answer
  • What is the only common infection of the reproductive tract caused by a protozoan?
    12·1 answer
  • A group of animals have short narrow legs that are partly webbed in which environment do these animals MOST LIKELY live
    14·1 answer
  • Why the answer for question 2 is D please give detail explanation and example​
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!