All categories

3 years ago

1. When during the cell cycle is a cell’s DNA replicated?

Biology

2 answers:

Llana [10]3 years ago

4 0

Answer: The correct answers are-

1) C) S Phase

2) A) prophase, metaphase, anaphase, telophase.

Cell cycle corresponds to the division of cell, which occurs primarily through two phases that are - Interphase ( which has G1, S, and G2 phase) during which cell grows, duplicates its genetic material and M ( mitotic phase) phase during which cell divides.

S phase ( synthesis phase) corresponds to the duplication of the genetic material (DNA). It takes place place after G1 ( Gap 1 phase) phase.

2) Mitosis is a type of cell divison in which one parent cell divides to produce two daughter cells with same number of chromosomes. Prophase is the first phase, followed by metaphase, anpahse, and telophase.

katrin [286]3 years ago

4 0

1. I believe the correct answer is C. S Phase.

2. I believe the answer is B. interphase, prophase, metaphase, anaphase and telophase

<h2>Explanation:</h2>

The cell cycle is divided into 4 stages i.e. the Gap 1 (G1), Gap 2 (G2), Synthesis (S) and Mitosis (M) stage. The M stage is the longest and has 5 further stages that are interphase, prophase, metaphase, anaphase and then telophase. It is during the S phase that DNA is replicated

<h2>Further Explanation:</h2>

The cell cycle starts with the G1 stage where the cell rests from a previous cycle and also checks for any errors in the DNA. If none were found, it will proceed to the Synthesis (S) phase. In this phase, the chromosomes enter as single strands but come out as double strand due to replication of DNA. The cell cycle enters the G2 phase where for the last time error checking is done to confirm if any errors are present. If any are present, the cycle is terminated and if not, it proceeds to the Mitosis phase. In the M phase, the cell will undergo extensive cell division which starts with the chromatin condensing in the interphase and the nucleus envelope disappears releasing the chromosome pairs. Pairs of chromosomes then emerge in the prophase and food is stored for the division including doubling of cell organelles. Microtubules form in this stage. The cell then enters the metaphase stage where the chromosome pairs arrange themselves at the equator of the cell and held by the microtubules. The microtubules start to shorten and in the anaphase stage, single strands of chromosome are pulled to different poles of the cell and the microtubules then continue to shorten much more further pulling the single strands more towards the different poles. The cytoplasm then starts to pinch into 2 (cytokinesis) and the different sides start forming different nucleus. IN the end of telophase, 2 daughter cells emerge and the M phase ends concluding the cell cycle. The cell again will go into G1 phase to rest and start the next cycle.

<h2>Learn More:</h2>

Learn more about the cell cycle: brainly.com/question/10767798
Learn more about mitosis: brainly.com/question/1982376
Learn more about cell division: brainly.com/question/12326275

You might be interested in

What can you do it make sure you have a healthy credit report? everfi?

kolezko [41]

<span>Review your credit report annually to ensure information contained is accurate. Immediately contact all three credit bureaus to correct mistakes. Have revolving and installment accounts that are kept current. Pay debt on time to prevent derogatory information from being reported.</span>

5 0

3 years ago

On average, the adult brain loses _____ percent of its weight between the ages of 20 and 90.

charle [14.2K]

The brain loses 5-10 percent of its weight between the ages 20 & 90.

6 0

3 years ago

Which best describes stem cells

g100num [7]

We need options :) but stem cells are a amazing type of cells that are able to develop into many different types of cells <span>First, they are unspecialized cells capable of renewing themselves through </span>cell division<span>, sometimes after long periods of inactivity. Second, under certain physiologic or experimental conditions, they can be induced to become tissue- or organ-specific cells with special functions. In some organs, such as the gut and bone marrow, stem cells regularly divide to repair and replace worn out or damaged tissues. In other organs, however, such as the pancreas and the heart, stem cells only divide under special conditions.</span>

7 0

3 years ago

Does the enzyme make the reaction occur faster

Scrat [10]

Answer:

Enzymes are biological catalysts. Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering activation energy.

5 0

3 years ago

Read 2 more answers

This model shows the basic process of making a protein. What are the strengths and limitations of this model?

Len [333]

Answer:

Results

We systematically analyze and compare how different modelling methodologies can be used to describe translation. We define various statistically equivalent codon-based simulation algorithms and analyze the importance of the update rule in determining the steady state, an aspect often neglected. Then a novel probabilistic Boolean network (PBN) model is proposed for modelling translation, which enjoys an exact numerical solution. This solution matches those of numerical simulation from other methods and acts as a complementary tool to analytical approximations and simulations. The advantages and limitations of various codon-based models are compared, and illustrated by examples with real biological complexities such as slow codons, premature termination and feedback regulation. Our studies reveal that while different models gives broadly similiar trends in many cases, important differences also arise and can be clearly seen, in the dependence of the translation rate on different parameters. Furthermore, the update rule affects the steady state solution.

Conclusions

The codon-based models are based on different levels of abstraction. Our analysis suggests that a multiple model approach to understanding translation allows one to ascertain which aspects of the conclusions are robust with respect to the choice of modelling methodology, and when (and why) important differences may arise. This approach also allows for an optimal use of analysis tools, which is especially important when additional complexities or regulatory mechanisms are included. This approach can provide a robust platform for dissecting translation, and results in an improved predictive framework for applications in systems and synthetic biology.

hope it help friends

3 0

2 years ago

Read 2 more answers