Cell division (chapter 6) Flashcards
The 2 stages is cell division are what?
Mitosis & Cytokinesis
Before a cell divides, it makes a copy of its genes during what phase?
Interphase
When all the genes of a chromosome have duplicated but are still attached, the structures that are formed are called what?
Sister chromatids
In mitosis the chromosomes are lined up at the center of the spindle during ____________?
Metaphase
Asexual reproduction is reproduction by ___________.
Mitosis cell divisions
A cell surrounded by a protective covering is a ____________?
Spore
By what process does sexual reproduction copy genetic information?
Meiosis
The new cell that forms the Union of two gametes is called ___________?
A zygote
A cell or an organism that had two of each kind of its chromosome is __________________?
Diploid
Which of the following does NOT belong with the other 3? Why?
Phosphate, sugar, base, protein
Protein because the other 3 are parts of a nucleotide
Which of the following is NOT one of the four bases in a DNA molecule?
Adenine, guanine, uracil, cytosine
Uracil
Genes are sections of _____________?
DNA
Which of the following never contains the code for the sequence of amino acids needed to manufacture a protein?
tRNA
What carries the genetic code from the DNA to the ribosomes?
Messenger RNA
T/F: cytokinesis is the division of a cells cytoplasm and organelles.
T
T/F: during cell division it is important that each new cell get exactly the same amount of cytoplasm and the same number of organelles.
F
T/F: the cells of human skin may go through mitotic cell division several times a day.
T
T/F: regeneration takes place through the process of cell division.
T
T/F: an organism can reproduce sexually or asexually but not both.
F
T/F: Watson and Crick worked out a model of DNA.
T
T/F: in the DNA molecule, adenine always pairs with thymine.
T
T/F: RNA is a double-sided chain that looks something like a twisted ladder.
F
In the RNA molecule, uracil always pairs with cytosine.
F
T/F: protein synthesis occurs at ribosomes.
T
List the 4 phases of mitosis in the order they occur:
Prophase, metaphase, anaphase, telophase
What do oncologists research?
Cancer
How many cells are present at meiosis?
4
A group of three nucleotides
Condon
The basic unit of DNA & RNA, consisting of a sugar, a phosphate, and a vase:
Nucleotide
The process of forming two DNA molecules from one:
Replication
The process of forming mRNA from DNA:
Transcription
The process of putting amino acids together in a specific sequence:
Protein synthesis
List 2 types of molecules. Which one carries the DNA code?
tRNA & mRNA
mRNA
Thymine, cytosine, adenine, uracil & guanine are the bases in both DNA & RNA. Which one is ONLY in RNA?
Uracil
What is a gene?
A specific segment of DNA - contains blueprints
In what phase of mitosis dose each X shaped chromosome separate into L shaped chromosomes
Anaphase
Please label the mitosis worksheet
Yes Mother… I love you so much!
