Biology 2.6 Review

The cell cycle control system

• receives messages from the outside of the cell that influence cell division

• triggers and controls major events in the cell cycle

• is influenced by growth factors that bind to cell receptors

• all of the above

Which cell cycle checkpoint occurs before DNA duplication?

• G₁ Checkpoint

• G₂ Checkpoint

• M Checkpoint

• Checkpoint Charlie

What are the chemical components of a DNA nucleotide?

• a phosphate, a sugar, and a nitrogenous base.

• a phosphate, a nitrogenous base, and an amino acid

• a nitrogenous base, a sugar, and an amino acid

• carbon atoms in sugars

Who was credited with the discovery of the structure of the DNA molecule?

• Alfred Hershey and Martha Chase

• Rosalind Franklin and Maurice Wilkins

• James Watson and Francis Crick

• Linus Pauling

The nitrogen bases in DNA are?

• Adenine, codeine, nicotine, glycogen

• guanine, adenine, uracil, glycogen

• cytosine, uracil, codeine, agenine

• Adenine, guanine, cytosine, thymine

DNA molecule is made of ___________ strands

• 1

• 2

• 3

• 4

The DNA is called the double helix because___?

• it's two strands twist

• it's two strands unwind

• it's tow strands coil up

• it's two strands cross

The type of sugar in DNA is ___________ sugar

• Ribose

• Fructose

• Maltose

• Deoxyribose

In the diagram, what is letter A? 

• product
• substrate
• enzyme-substrate complex
• active site

Tags

NGSS.MS-LS1-7

What is the function of an enzyme?

• enzymes break themselves into small pieces
• enzymes slow down chemical reactions
• enzymes speed up chemical reactions
• enzymes combine products to form reactants 

Tags

NGSS.MS-PS1-2