HBIO370 EXAM QUESTIONS AND ANSWERS WITH COMPLETE
SOLUTIONS GRADED A++ LATEST UPDATE
what is genetics?
branch of science concerned with genes, heredity, and variation in living organisms
where is genetic info stored?
nucleus of a cell in the DNA
who's watson, crick and Wilkins?
discovered the structure of dna
A and T make how many bonds?
2 bonds
C and G make how many bonds?
3 bonds
differences between dna and rna?
- DNA has an H and RNA has an OH
- DNA has Thymine and RNA has uracil
- DNA is a double helix and RNA is a single helix
What does each nucleotide consist of?
sugar, a phosphate, and a base
What are nucleosomes?
- DNA and histones packed form nucleosomes
- compacted to a helical shape called Solenoid
, Solenoid
assembled to form a loop and with a protein scaffold they form the chromosome
Acrocentric
very small p (top sister chromatids)
Is the p arm the top or bottom?
the p arm is the top and then q is the bottom
telocentric
not in humans
weirdo bent one where the centromere is at the top and there is no p arm at all
submetacentric
kinda normal but the bottom q arm is slightly longer, p is only kind of shorter
metacentric
sister chromatids are divided right in the middle
how many pairs of chromosomes do we have?
23 pairs
1 set from mom and 1 set from dad
homologous chromosomes
how long are telomeres?
8-10Kb to 1Kb (bc they shrink )
older cells have shorter telomeres
how big are centromeres?
0.3 to 5Mb
what are the steps of mitosis?
SOLUTIONS GRADED A++ LATEST UPDATE
what is genetics?
branch of science concerned with genes, heredity, and variation in living organisms
where is genetic info stored?
nucleus of a cell in the DNA
who's watson, crick and Wilkins?
discovered the structure of dna
A and T make how many bonds?
2 bonds
C and G make how many bonds?
3 bonds
differences between dna and rna?
- DNA has an H and RNA has an OH
- DNA has Thymine and RNA has uracil
- DNA is a double helix and RNA is a single helix
What does each nucleotide consist of?
sugar, a phosphate, and a base
What are nucleosomes?
- DNA and histones packed form nucleosomes
- compacted to a helical shape called Solenoid
, Solenoid
assembled to form a loop and with a protein scaffold they form the chromosome
Acrocentric
very small p (top sister chromatids)
Is the p arm the top or bottom?
the p arm is the top and then q is the bottom
telocentric
not in humans
weirdo bent one where the centromere is at the top and there is no p arm at all
submetacentric
kinda normal but the bottom q arm is slightly longer, p is only kind of shorter
metacentric
sister chromatids are divided right in the middle
how many pairs of chromosomes do we have?
23 pairs
1 set from mom and 1 set from dad
homologous chromosomes
how long are telomeres?
8-10Kb to 1Kb (bc they shrink )
older cells have shorter telomeres
how big are centromeres?
0.3 to 5Mb
what are the steps of mitosis?
