- What is the longest phase of mitosis?
- How do mitochondria make energy?
- Do plant cells have more mitochondria than animal cells?
- Why do plant cells have mitochondria?
- Does mitochondria have its own DNA?
- Do mitochondria make their own proteins?
- Can chloroplasts and mitochondria reproduce themselves?
- What happens to mitochondria during mitosis?
- Do mitochondria have circular DNA?
- Do plant cells have a mitochondria?
- Can plants live without mitochondria?
- Can mitochondria replicate itself?
- In what phase does the mitochondria replicate?
- Do mitochondria have a cell wall?
What is the longest phase of mitosis?
prophaseThe first and longest phase of mitosis is prophase.
During prophase, chromatin condenses into chromosomes, and the nuclear envelope (the membrane surrounding the nucleus) breaks down..
How do mitochondria make energy?
Mitochondria, using oxygen available within the cell convert chemical energy from food in the cell to energy in a form usable to the host cell. … NADH is then used by enzymes embedded in the mitochondrial inner membrane to generate adenosine triphosphate (ATP).
Do plant cells have more mitochondria than animal cells?
Both animal and plant cells have mitochondria, but only plant cells have chloroplasts. Plants don’t get their sugar from eating food, so they need to make sugar from sunlight. … Because animals get sugar from the food they eat, they do not need chloroplasts: just mitochondria.
Why do plant cells have mitochondria?
Explanation: Plant cells require mitochondria to produce energy for the cell, usually through photosynthesis during the day. When the sun sets and the energy from sunlight is lost, the plant continues on through the night producing energy through cellular respiration.
Does mitochondria have its own DNA?
Although most DNA is packaged in chromosomes within the nucleus, mitochondria also have a small amount of their own DNA. This genetic material is known as mitochondrial DNA or mtDNA.
Do mitochondria make their own proteins?
Although present-day mitochondria do synthesize a few of their own proteins, the vast majority of the proteins they require are now encoded in the nuclear genome.
Can chloroplasts and mitochondria reproduce themselves?
Replication. Mitochondria and chloroplasts make more of themselves in much the same way as bacteria reproduce. … The only way these organelles can be replicated is through the same method used by bacteria: binary fission.
What happens to mitochondria during mitosis?
Mitochondria undergo fragmentation during mitosis and are well distributed throughout the cell soma due to their interactions with the ER and cytoskeleton. As a result, cytokinesis can result in the partitioning of roughly equal amounts of mitochondria to daughter cells.
Do mitochondria have circular DNA?
Small cellular organelles called mitochondria contain their own circular DNA. … This organelle is the mitochondrion, the powerhouse of eukaryotic cells. In contrast to the human nuclear genome, which consists of 3.3 billion base pairs of DNA, the human mitochondrial genome is built of a mere 16,569 base pairs.
Do plant cells have a mitochondria?
Plant cells have a nucleus, cell membrane, cytoplasm and mitochondria too, but they also contain the following structures: Cell wall – A hard layer outside the cell membrane, containing cellulose to provide strength to the plant.
Can plants live without mitochondria?
You can’t survive without mitochondria, the organelles that power most human cells. Nor, researchers thought, can any other eukaryotes—the group of organisms we belong to along with other animals, plants, fungi, and various microscopic creatures.
Can mitochondria replicate itself?
Mitochondrial DNA replicates by increasing the number of genomes in proportion to mitochondrial mass, but without ensuring that each genome replicates the same number of times. This can lead to changes in the representation of alleles in the daughter mitochondria.
In what phase does the mitochondria replicate?
mtDNA initiation of replication and transcription are lowest during nDNA replication. Initiation of mtDNA replication increases again at the end of the S-phase, and it declines subsequently. This last event is followed by high levels of mitochondrial transcription in G2 before cells undergo mitosis.
Do mitochondria have a cell wall?
Mitochondria possess inner and outer membranes, with the inner membrane consisting of folds called cristae. Bacterial cell membranes have folds called mesosomes that resemble the cristae. … The outer mitochondrial membrane and the cell wall of bacteria also contain similar structures.