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
azamat
3 years ago
13

How many rounds of dna replication are there in a meiotic cell cycle?

Biology
1 answer:
RUDIKE [14]3 years ago
7 0

Answer:

Two rounds

Explanation:

Meiosis is characterized by one round of DNA replication followed by two rounds of cell division, resulting in haploid germ cells. Crossing-over of DNA results in genetic exchange of genes between maternal and paternal DNA.

You might be interested in
Which process produces offspring that are better able to cope with changes in the environment?
Kamila [148]
The correct answer is an asexual reproduction. The process of asexual production is the process in which produces offspring that are better and is able to cope with changes in the environment. The offspring will only inherit the parent's genes, however, not the fusion of the gametes. 
3 0
3 years ago
Read 2 more answers
The gas exchange during cellular respiration involves _____ moving into cells and ____ moving out of cells. The gas exchange dur
ludmilkaskok [199]

The gas exchange during cellular respiration involves oxygen moving into cells and carbon dioxide moving out of cells.

During gas change oxygen actions from the lungs to the bloodstream. on an equal time, carbon dioxide passes from the blood to the lungs. This happens within the lungs among the alveoli and a network of tiny blood vessels known as capillaries, which might be located in the walls of the alveoli.

Three strategies are critical for the switch of oxygen from the out of doors air to the blood flowing through the lungs: airflow, diffusion, and perfusion. ventilation is the manner through which air moves in and out of the lungs.

The lungs and respiratory system permit us to respire. they create oxygen into our bodies (called a concept, or inhalation) and send carbon dioxide out (referred to as expiration, or exhalation). This alternate of oxygen and carbon dioxide is referred to as respiratory.

Learn more about the gas exchange here brainly.com/question/15423560

#SPJ4

6 0
2 years ago
Read 2 more answers
DCCD (dicyclohexylcarbodiimide) inhibits oxidative phosphorylation when the substrate is mitochondrial NADH. DCCD is a drug that
VARVARA [1.3K]

Answer:

A) Decreases cellular energy production

B) DCCD also affects K+ transport

Explanation:

A) Consequences are of DCCD on cellular energy production: <em>Decreases cellular energy production</em>

ATP-synthase pump is composed of two subunits: F1 catalytic subunit that synthesizes ATP, and F0 proton pumping subunits, that transport H+ through the membrane. F1 subunit might act independently of F0 to produce ATP, but this molecule can not be released without H+ gradient, which generates a movement necessary for ATP release from the catalytic center.

When any of the parts composing F0 react with DCCD, the subunit can not transport H+ through the membrane. DCCD inhibits the enzyme activity by blocking the protons´ flow.

As DCCD blocks the protons´ flow, and the protons´ flow is necessary to release the ATP molecule from the F1 subunit, no other ADP + Pi can enter to F1 subunit, and the production of ATP stops.

B) Other cellular effects of DCCD

There seem to be other effects of DCCD on cell activity, some of which are still under study. To name a few:

  • Diimide from DCCD seems to stimulate cytochrome b reduction and inhibits its reoxidation by ferricyanide.
  • When exposing the cell to high concentrations of DCCD for a long time, might occur an alteration in the electron transporting chain
  • Inhibition of ubiquinol-cytochrome c reductase activity when exposing the cell to high concentrations of DCCD.
  • Inhibition of K+ transport, associated with the inhibition of H+ transport.

Concerning the effect of DCCD on the K+ transport, DCCD stops the extrusion of H+ and the consequent intrusion of K+.

DCCD strongly inhibits the simultaneous flow of H+ and K+. First, it inhibits H+ flow, acidification of the environment stops, but at this point, K+ keeps moving through the membrane. Once the H+ flow has ceased, the K+ flow slowly decreases until it finally stops moving. There is a lag time in the DCCD effect on K+ flow to the instantaneous effect on H+ flow.

5 0
3 years ago
(c)
Gwar [14]

Answer:

villi is used and is very imp as it has structure like finger type which help for increase in surface area for more absorption and less wastage of water/minerals

3 0
3 years ago
Why doesn't the Gulf Stream warm Providence, Rhode Island, or Bangor, Maine
coldgirl [10]
The answer is b i did the quiz
6 0
3 years ago
Other questions:
  • Does anyone have answers i will give brailiest for the first person who answers Lesson 11: The Nature of Life Unit Test
    13·1 answer
  • 1.What changes occur to chemical bonds during a chemical reaction?
    6·1 answer
  • What percentage range of an adult's kilocalories is recommended as the maximum to be obtained from fat?
    6·1 answer
  • When the polymerase chain reaction (PCR) is used to amplify segments of DNA, the sample is first heated, and then cooled, in cyc
    11·1 answer
  • Which of the following is not a characteristic of all living things?
    13·1 answer
  • According to the density profile shown here, at which depth would you find the coolest, saltiest waters?
    9·2 answers
  • What is the attractive pull between any two objects
    6·2 answers
  • Honestly I barely use brainly anymore so I'm giving my 1532 points away.
    11·2 answers
  • Many states and local authorities are requring cars to have their emission
    15·1 answer
  • Like replication and transcription, translation is a process in which the information present within a nucleic acid template is
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!