QUIZ QUESTIONS Flashcards
the region at the end of a chromosome that keeps chromosomes from sticking together and plays a role in aging
telomere
long arm of a chromosome
q arm
t or f: humans have 23 pairs of autosomes
false. humans have 22 homologous autosomal chromosome and 23rd pair is the sex chromosome.
t or f: a human with monosomy has an extra chromosome
false. one less
t or f: sex chromosome aneuploidy is more common than autosomal anueploidy
true
t or f: nondisjunction can only happen during meiosis 1
false
a chromosomal region has broken off and switched places with a region from a non-homologous chromosome
translocation
Klinefelter syndrome
has 47 chromosomes and 2 X chromosome and one Y chromosome
a chromosome with short and long arms of the same length is called
metacentric
a karyotype can’t reveal
DNA sequence
the possibility of a trisomy increases as
maternal age increases
When Griffith injected only strain S into mice, he found that:
the mice died
which of the following is not a nitrogenous base found in RNA?
thymine
T or f: RNA is typically double stranded
false. single stranded. dna is double
t or f: each species has a set genome size.
true
what sugar does DNA contain?
deoxyribose
DNA has a specific base pairing rule
adenine always pairs with thymine
cytosine always pairs with guanine
which researcher(s) were the first to identify DNA as the transforming factor ?
Avery, MacLeod, and McCarty
A region of DNA has the sequence: 5’ ATG TAC CGT 3’
What is the complementary sequence to this region?
3’ TAC ATG GCA 5’
which researchers are the first to purify nuclein?
Miescher
what of the following is not part of a nucleotide of DNA?
histone protein
what is the three letter abbreviation of the amino acid that is coded for by the following mRNA codon: UUG
Leu
what is the three letter abbreviation of the amino acid that is coded for by the following mRNA codon: AAC
Asn
Put the following events of gene expression in order from first to last.
transcription, mRNA processing, translation
translation takes place in the nucleus
false. in the cytoplasm.
t or f: mutations can have an effect on the functionality of proteins
true
t or f: nucleic acids are folded into proteins
false
which amino acid is always the first one in a polypeptide ?
MET
what mRNA sequence is transcribed from the following DNA sequence?
3’ GCT AGC CAA 5’
5’ CGA UCG GUU 3’
during which stage of translation are peptide bonds formed between the new amino acids of growing polypeptide?
elongation
during what stage of transcription does RNA polymerase bind to the promoter region of a gene?
initiation
which of the following is not found in a mature mRNA molecule?
intron
