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Pathophysiology 9th Edition McCance 9780323789882 , All Chapters with Answers and Rationals .
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Pathophysiology 9th Edition McCance 9780323789882 , All Chapters with Answers and Rationals .
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Test Bank For Pathophysiology 9th Edition McCance9780323789882 , All Chapters with Answers and Rationals .
Genes are composed - ANSWER: DNA
genes are located on - ANSWER: chromosomes
The most important constituent of DNA is the four types of nitrogenous bases, which are labeled -
ANSWER: A, C, G, T
DNA bases code for - ANSWER: amino acids, therefore making proteins
amino acids in DNA are specified by - ANSWER: Triplet codons of nitrogenous bases
DNA replication is based on - ANSWER: complementary base pairing
DNA polymerase is the primary enzyme involved in - ANSWER: replication
It adds bases to the new DNA strand and performs
"proofreading" functions
A mutation is - ANSWER: an inherited alteration of genetic material
Substances that cause mutations are - ANSWER: mutagens
The mutation rate in humans - ANSWER: ranges from 10-4 to 10-7 per gene, per generation
What is the difference between RNA and DNA? - ANSWER: -RNA is single stranded and DNA is double
stranded
-RNA also has uracil instead of thymine
transcription and translation - ANSWER: - occurs in the nucleus where the mRNA takes a copy of DNA
- occurs in the cytoplasm with the help of ribosomes
- purpose is to produce proteins throughout the body ; DNA codes for that
Transcription is - ANSWER: A base-pairing event. mRNA takes the code to the ribosome in the
cytoplasm where the amino acids will be assembled.
Much of the RNA sequence is spliced from the mRNA before - ANSWER: the mRNA leaves the nucleus.
-Excised sequences are introns
-Exons remain to code for proteins
MicroRNA's - ANSWER: small single-stranded RNA molecules that can bind to complementary
sequences in mRNA molecules (17-27 nucleotides in length)
Transcription factor-binding sites - ANSWER: The places in the genome where transcription factors
bind
Translation is - ANSWER: the process in which the genetic code in mRNA is read to make a protein
from the ribosomes
During translation, mRNA interacts with - ANSWER: tRNA, a molecule that has an attachment site for a
specific amino acid
Human cells consist of - ANSWER: diploid somatic cells and haploid gametes
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