Cell Divisions

Question 1

Is the series of changes the cell experiences from the time it is formed until it divides

Answer 1

Cell life cycle

Question 2

Cell life cycle has two major periods

Answer 2

1) interphase ( metabolic phase)
2) cell division

Question 3

In this phase cell grows and carries on metabolic processes, and it is longer phase of the cell cycle

Answer 3

Interphase

Question 4

Cell reproduces itself

Answer 4

Cell divisions

Question 5

For events in the interphase

Answer 5

G1
S (Synthesis or replication of DNA)
G2
G0

Question 6

8 to 10 hours cell metabolically, organelle, duplication and cytosolic components, centrosome replication begins

Answer 6

G1

Question 7

4 to 6 hours cell growth continues; enzymes and other proteins are synthesized; centrosome replication completed

Answer 7

G2

Question 8

DNA replication

Answer 8

S (synthesis)

Question 9

Exit from cell cycle

Answer 9

G0

Question 10

Genetic material is duplicated and readies a cell for division into two cells

Answer 10

DNA replication

Question 11

Occurs toward the end of interphase

Answer 11

DBA Replication

Question 12

Nucleotides are complementary

____________ Always bonds with thymine (T)

____________ always bonds with cytosine (C)

Answer 12

1) Adenine
2) Guanine

Question 13

Events of cell division

Answer 13

1) mitosis
2) cytokinesis

Question 14

It is divisions of the nucleus and results in the formation of two daughter nuclei

Answer 14

Mitosis

Question 15

It is divisions of the nucleus and results in the formation of two daughter nuclei

Answer 15

Mitosis

Question 16

Division of the cytoplasm

Where it begins when mitosis is near completion and results formation of two daughter cells

Answer 16

Cytokinesis

Question 17

Events of mitosis: ____________

Chromatin coils into chromosomes, identical strands called CHROMOSOMES are hold together by the CENTROMERE

Answer 17

Prophase

Question 18

Events of mitosis: ____________

Centrioles direct assembly of a mitotic spindle and the

Nuclear envelope and nucleoli have broken down

Answer 18

Prophase

Question 19

Events of mitosis: ____________

Chromosomes are aligned in the center of the cell on the metaphase plate

Straight line of chromosomes is now seen

Answer 19

Metaphase

Question 20

Events of mitosis: ____________

Centromere splits
Chromatids move slowly apart, and toward the opposite end of the cell
It is over when the chromosome stopped moving

Answer 20

Anaphase

Question 21

It is reverse of prophase

Answer 21

Telophase

Question 22

Events of mitosis: ____________

Chromosomes uncoil to become chromatin

Spindles breakdown and disappear

Nuclear envelope reforms around chromatin

Nuclei appear in each of the daughter nuclei

Answer 22

Telophase

Question 23

is division of the cytoplasm

Answer 23

Cytokinesis

Question 24

Begins during late anaphase and completes during telophase

Answer 24

Cytokinesis

Question 25

A _________________ (contractile ring of microfilaments) forms to pinch the cells into two parts

Answer 25

Cytokinesis

Question 26

In this phase to daughter cells exist

Answer 26

Cytokinesis

Question 27

Cytoplasm is common in the

Answer 27

Liver and skeletal muscle

Question 28

DNA serves as a blueprint for making proteins

Answer 28

Protein synthesis

Question 29

DNA segment that carries a blueprint for building one protein or polypeptide chain

Answer 29

Gene

Question 30

1) Proteins are the building materials for cells 2) proteins can add as enzymes (biological catalyst)

Answer 30

1) fibrous (structural) proteins 2) globular (functional) proteins

Question 31

Most ribosomes, the manufacturing sites of proteins are located in the ____________

Answer 31

Cytoplasm

Question 32

Both the decoder and Messenger functions of DNA are carried out by ____________

Answer 32

Ribonucleic acid RNA

Question 33

RNA is ____________ RNA contains (2)

Answer 33

Single- stranded 1) Ribose sugar 2) uracil

Question 34

Three varieties of RNA 1) transfers appropriate amino acids to the ribosome for building the protein 2) carries the instructions for building a protein from the nucleus to the ribosome 3) Helps form the ribosomes where proteins are built

Answer 34

1) Transfer RNA 2) messenger RNA 3) ribosomal RNA

Question 35

Protein synthesis involves two major phases

Answer 35

1) transcription 2) translation

Question 36

Transfer of information from the DNAs base sequence to the complimentary base sequence of MRNA

Answer 36

Transcription

Question 37

____________ is the template for transcription: ____________ is the product

Answer 37

DNA mRNA

Question 38

Base sequence of nucleic acid is translated to an amino acids

Answer 38

Translation

Question 39

Occurs in the cytoplasm and involves three major varieties of RNA

Answer 39

Translation

Question 40

Is steps for translations where mRNA leaves nucleus and attaches the ribosomes and translations begins

Answer 40

Step 2

Question 41

In this step release, the RNA re-enters the cytoplasmic pool ready to be recharged with new amino acid

Answer 41

Step 5

Question 42

Incoming tRNA recognizes COMPLIMENTARY MRNA codon calling for its amino acid by temporarily binding its anticodon to the codon

Answer 42

Step 3

Question 43

As the ribosomes moves along, the mRNA, a new amino acid is added to the growing protein chain

Answer 43

Step 4

Question 44

Cells divide for

Answer 44

1) repair 2) growth 3) maintenance