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NATS1670 EXAM | QUESTIONS WITH CORRECT SOLUTIONS | PASSED!!
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NATS1670 EXAM | QUESTIONS WITHCORRECT SOLUTIONS | PASSED!!
Origin of cancer mutations Correct Ans - spontaneous, physically &
chemically induced based on environment.
has 60 known components with biological effects Correct Ans -
Tobacco
highest death cause for USA and Canada Correct Ans - hacking darts
What is the central dogma? Correct Ans - DNA-transcription-RNA-
translation-protein
DNA Correct Ans - Info storage
RNA Correct Ans - Info carrier
Phenotypes are Correct Ans - physical expressions of genetic traits
Ex. eye color
Atom Correct Ans - smallest form of matter
Molecule Correct Ans - two or more atoms held together by covalent
bonds
Nucleotide structure Correct Ans - -deoxyribose sugar
-nitrogenous base
-phosphate group
(A) adenine, (T) thymine, (C)cytosine,(G) guanine Correct Ans - A=T,
C=G
Who proposed the double helix model? Correct Ans - Watson and
Crick
,polymerase chain reaction (PCR) Correct Ans - A method of producing
thousands of copies of DNA segment using the enzyme DNA polymerase
DNA replication Correct Ans - The process in which DNA makes a
duplicate copy of itself.
DNA polymerase Correct Ans - require a template and a starter to
synthesize dna in the 5' to 3' direction
why is polymerase chain reaction important? Correct Ans - DNA
replication in a tube: a fundamental method in science
Why is genetic testing so fundamental? Correct Ans - identifying
infectious disease
components involved in protein synthesis Correct Ans - ribosomes,
tRNA, mRNA
Proteins are the active players in most cell processes Correct Ans -
enzymatic and regulatory
mRNA Correct Ans - template that is used to specify amino acid
sequence
complex of proteins and rRNA molecules Correct Ans - Ribosomes
Genetic code is a universal code used in the nuclear genome of most
organisms Correct Ans - 64 possible codons and 20 amino acids
Translocation Correct Ans - occurs when the ribosome moves down
the mRNA in the 5-3 direction
3 steps in elongation repeat down the length of mRNA Correct Ans - -
arrival of amino acid loaded tRNA
-peptide bond formation
-translocation
Polyribosomes Correct Ans - string of ribosomes, assembled along an
mRNA to increase the rate of protein production
, tRNA Correct Ans - transfer RNA; type of RNA that carries amino acids
to the ribosome
Mutation Correct Ans - any change in the DNA of a gene or
chromosome
length of human DNA cell Correct Ans - 2 meters
point mutation Correct Ans - gene mutation in which a single base pair
in DNA has been changed
Chromosomes Correct Ans - several levels of DNA packaging
COPD Correct Ans - chronic obstructive pulmonary disease
Lung cancer death Correct Ans - 87% of lung cancer deaths are from
smoking
how many human cells in body Correct Ans - 30 trillion
how many human genes in human body Correct Ans - 20,000
how many microbial cells are there? Correct Ans - 39 trillion
Immunology is the study of Correct Ans - protection from and
response to foreign invading organisms and altered host cells
How do you fight viruses? Correct Ans - activate immune system
fighting bacteria Correct Ans - synergism between antibiotics and
immune system
how many microbial genes Correct Ans - 2-20 million
flora and anatomical barriers Correct Ans - SKIN- outer layer, normal
flora, flushing (sweat), phospholipids, gastrointestinal tract; peristalsis, low
PH , Naso-pharynx; mucus, saliva, tears, flushing, lysosome.
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