Life Science CHPT 3

Life Science 1

1

A DNA molecule looks like a?

Twisted Ladder 

2

Each section of a DNA molecule that codes for a unique protein is called a 

Gene

3

In this process ribosomes need working copies of the DNA that they can use to make proteins. 

Transcription 

4

Sets of three nucleotides in a row are called?

Codons 

5

A process in which amino acids are bonded together in a growing chain?

Protein synthesis 

Life Science 2

1

Cars in a factory being made is an example of?

Engineered systems 

2

When skills and knowledge were needed to make them

irreducible complexity 

3

As cells grow they prepare to reproduce. This process is called?

Cell Cycle 

4

Cells spend most of their time in the _______ portion of the cell cycle. 

Interphase 

5

Scientist call the DNA-copying process 

Replication 

Life Science 3

1

Nucleotides are found in the ?

Nucleus of each cell

2

After a cell is done copying its organelles and DNA, its ready for the next phase of the cell cycle called?

Mitosis 

3

In this face the membrane around the nucleus disappears?

Prophase 

4

In this phase the chromosomes are lined up at the center of the cell. 

Metaphase 

5

During this phase sister chromatid pairs divide into separate chromosomes. 

Anaphase 

Life Science 4

1

During _________ the new chromosomes reach opposite ends of the cell and begin to uncoil. 

Telophase 

2

The final state of the cell cycle?

Cytokinesis 

3

This type of reproduction does not involve eggs?

Asexual reproduction 

4

Matching pairs of chromosomes are called?

Homologous 

5

Similar to mitosis ________- begins with the number of genes in the parent cell

Meiosis 

Life Science 5

1

The joining of gametes is called 

Fertilization 

2

The diploid cell tht results from fertilization is called?

Zygote 

3

Reproduction using gametes 

Sexual reproduction 

4

The sides of DNA ladder is made up of two different molecules?

Deoxyribose and phosphate 

5

MRNA stands for?

(Messenger) Ribonucleic Acid