A) Which of the following demonstrates the central dogma of molecular biologists? (1 point)
DNA and RNA mutate into either harmful or helpful effects on the human body.
Gene expression relies on environmental factors that determine which traits are dominant.
DNA and RNA hold the code to create proteins that are the key to gene expression.
Proteins replicate DNA which gives the expression of traits to an organism.
C) DNA and RNA hold the code to create proteins that are the key to gene expression.
A) After the amino acid chain leaves the ribosome, which organelle then folds, modifies, and transports the protein? (1 point)
Lysosome
Ribosome
Cytoplasm
Endoplasmic Reticulum
D) Endoplasmic Reticulum
A)
Look at the DNA sequence.
C G T T A C T G C A A T
G C A A T G A C G T T A
Which sequence shows a substitution mutation?
(1 point)
C G T C T A C T G C A A T
G C A G A T G A C G T T A
C G T G A C T G C A A T
G C A C T G A C G T T A
C G T A C T G C A A T
G C A T G A C G T T A
C G T T A C T G C A A T
G C A A T G A C G T T A
The sequence that shows a substitution mutation is:
G C A G A T G A C G T T A
The correct answer is: DNA and RNA hold the code to create proteins that are the key to gene expression.
To understand the central dogma of molecular biology, we need to know that it describes the flow of genetic information within a biological system. This concept was proposed by Francis Crick in 1958 and is fundamental to our understanding of how genes control the traits of organisms.
To find the right answer, let's analyze each option.
A) DNA and RNA mutate into either harmful or helpful effects on the human body.
This option incorrectly describes the outcome of DNA and RNA mutations. While mutations can have either harmful or helpful effects, they do not entirely encompass the central dogma of molecular biology.
B) Gene expression relies on environmental factors that determine which traits are dominant.
This option highlights the role of environmental factors in gene expression but does not accurately represent the central dogma.
C) DNA and RNA hold the code to create proteins that are the key to gene expression.
This option correctly describes the central dogma of molecular biologists. DNA contains the instructions for building proteins, and RNA acts as an intermediary in the process. Proteins, in turn, play a crucial role in gene expression.
D) Proteins replicate DNA, which gives the expression of traits to an organism.
This option is incorrect. Proteins do not replicate DNA. The process of DNA replication occurs through the action of specific enzymes.
Therefore, the correct answer is C) DNA and RNA hold the code to create proteins that are the key to gene expression.