PLTW: PBS Lesson 2.2 - Decoding a Diagnosis

How is the number of chromosomes in a human sex cell different from the number in a human body cell? 

• A sex cell has 23 chromosomes and a body cell has 46. 
• A sex cell has 46 chromosomes and a body cell has 23.
• A sex cell has chromosomes that are half
• A sex cell has chromosomes that are twice as long as those in a body cell. 

Which of these choices is made from the process of mitosis?

• Egg
• Sperm
• Sex Cell
• Skin Cell

Tags

NGSS.HS-LS1-4

Select the best description of a chromosome.

• material used to form the cell membrane
• tightly wound DNA that is ready for cell division
• long, stretched out strands of DNA
• molecules that form the sex cells

Which of these choices is not a reason for mitosis taking place in a multi-cellular organism?

• growth
• repairing wounds
• asexual reproduction
• making sex cells

Tags

NGSS.HS-LS1-4

The process by which the sequence of nucleotides in a messenger RNA is converted by a ribosome and transfer RNAs into a polypeptide with a specific sequence of amino acids is called

• Transcription

• Translation

• Mutation

• Replication

The process in which a strand of DNA is copied into an RNA strand for the purpose of protein synthesis is

• Transcription

• Translation

• Mutation

• Replication

A change in the DNA sequence of a chromosome is called a

• Transcription

• Translation

• Mutation

• Replication

Tags

NGSS.HS-LS3-2

How many letters make up codons?

• 3

• 2

• 4

• 1

The nucleotide T is replaced by what letter in RNA?

• U

• H

• A

• G

What is the only start codon?

• AUG

• GUC

• CGU

• UGG