Structure of a telomere. Telomere DNA loops back on itself to form a circular structure that protects the ends of chromosomes. Telomeres play a critical role in replication of the ends of linear DNA molecules (see Chapter 5).
How does the number of chromosomes in the daughter cells compare with the number of chromosomes in the original cell *?
Answer: Daughter cell have the same number of chromosomes as parent cells in mitosis, whereas in meiosis, daughter cells have only half the number of chromosomes as the parent cells. Explanation: Mitosis produces 2 diploid cells, whereas meiosis produces 4 haploid cells.
What is the end of the chromosome called quizlet?
– The ends of eukaryotic chromosomes are called telomeres. – The parts of chromosomes where the spindle apparatus will attach are called centromeres. – When a single chromosome has undergone DNA replication, it consists of two sister chromatids.
Which term describes the level of organization of a protein?
Organization of Protein Structure. There are four levels of protein structure: primary, secondary, tertiary, and quaternary. These levels also reflect their temporal sequence. Proteins are synthesized as a primary sequence and then fold into secondary → tertiary → and quaternary structures.
How do daughter cells compare to parent cells?
Mitosis creates two identical daughter cells that each contain the same number of chromosomes as their parent cell. In contrast, meiosis gives rise to four unique daughter cells, each of which has half the number of chromosomes as the parent cell.
What is division of cytoplasm called?
Cytokinesis is the physical process of cell division, which divides the cytoplasm of a parental cell into two daughter cells. It occurs concurrently with two types of nuclear division called mitosis and meiosis, which occur in animal cells.
What are the 4 parts of a chromosome?
6 Main Parts of a Chromosome
- Part # 1. Pellicle and Matrix:
- Part # 2. Chromatids, Chromonema and Chromomeres:
- Part # 3. Centromeres (= Primary constriction):
- Part # 4. Secondary Constriction:
- Part # 5. Satellite:
- Part # 6. Telomere:
What is chromosome structure and function?
Chromosomes, the thread-like structures are located inside the nucleus of all animal and plant cells. … Chromosomes are composed of DNA, histones, non-histone proteins, RNA and nucleic acids that help in the overall functioning of the cell for growth, reproduction and survival.
What are the 4 types of chromosomes?
On the basis of the location of the centromere, chromosomes are classified into four types: metacentric, submetacentric, acrocentric, and telocentric.