A. McEachern SCHS!!!

Which of the following is correct statement about the

events of the cell cycle?

• Little happens during G1 and G2 phases of the cell

  cycle.

• DNA replicates during the S phase of interphase.

• Mitosis is usually the longest phase of the cell cycle

  when the cell is growing.

• Interphase consists of the G1, S, G2 phases, and mitosis.

A laboratory assistant was told to watch the mitosis of

a eukaryotic cell under the microscope and inform the

lead scientist when the cell entered prophase. What

should the assistant expect to look for to indicate that

the cell is in prophase?

• The chromosomes gather at opposite ends of the cell

  and uncoil, and then two new nuclear envelopes form

  around this genetic material.

• The sister chromatids separate into individual

  chromosomes and are moved apart.

• The chromosomes line up across the center of the

  cell, and each chromosome is connected to a spindle

  fiber.

• The chromatin condenses into chromosomes, the

  nuclear envelope breaks down, and a spindle begins to

  form.

The cell cycle is important to the growth of organisms.

In humans, for example, mitosis begins shortly after the

egg is fertilized by the sperm, producing vast number of

cells needed for the embryo to take form. The diagram

below represents the stages of human embryo

development during the first 23 weeks.

During the process of mitosis, one parent cell divides to create -

• four new genetically different daughter cells.

• two new genetically identical daughter cells.

• three new genetically identical daughter cells.

• two new genetically different daughter cells.

Cell division is represented by what letter?

• A
• B
• C
• D

Tags

NGSS.HS-LS1-4

Which of the following is correct?

• S phase, cell division
• M phase, cell growth
• G1 phase, DNA replication
• G2 phase, preparation for division

Tags

NGSS.HS-LS1-4

Which shows the correct complementary base pairing for DNA?

• C-A, T-G
• A-G, C-T
• C-G, U-A
• T-A, G-C

What is pictured here?

• a nucleotide

• a fatty acid

• a protein

• a monosaccharide

Which 2 molecules form the sides (backbone) of the DNA ladder?

• deoxyribose sugar and adenine
• deoxyribose sugar and a hydrogen bond
• deoxyribose sugar and the nucleus
• deoxyribose sugar and phosphate

The two strands of DNA are held together by:

• Hydrogen Bonds
• Phosphodiester Bonds
• Glycolsyl Bonds
• Glycosidic Linkages

Why is DNA important?

• it is very small and very complicated
• it's in everything
• it serves as the blueprint for traits of all living things
• because we eat it every day for energy

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1