BIOL 3000 Quiz Questions

Which of the following statements best represents the theory of PANGENESIS?

Particles called gemmules, which originate in each part of the body, collect in the sperm or egg of an organism and are passed on to the next generation.

Which of the following groups of atoms, as part of the macromolecules of life, are part of RNA and a PROTEIN? (i.e. the atoms must be present in BOTH molecules).

Carbon, Hydrogen, Oxygen & Nitrogen

What kind of bond is formed between the 5' phosphate group (PO₄) of one nucleotide and the 3' hydroxyl (OH) group of the adjacent nucleotide?

Phosphodiester Bond

What kind of bond is formed between complementary base pairs to join the two DNA strands into a double helix?

Hydrogen Bond

Watson and Crick used evidence from several studies to determine the structure of DNA. What SPECIFIC conclusion were they able to draw from Rosalind Franklin's X-ray diffraction data provided by Photograph B51?

DNA is a duplex with two strands forming a double helix.

What is the difference between a nucleotide and a nucleoside?

A nucleoside does not have a phosphate group attached while a nucleotide does.

In their famous experiment, which of the following would Meselson and Stahl have observed after one cycle of replication in ¹⁴N medium if DNA replication was conservative?

An equal number of DNA molecules containing two 15N-DNA strands and DNA molecules containing two 14N-DNA strands.

If THYMINE makes up 21% of the DNA nucleotides in a particular genome, what are the percentages of the other nucleotides in the genome?

ADENINE = 21%; CYTOSINE = 29%; GUANINE = 29%

In the Hershey Chase Experiment to confirm DNA as the heritable material, which result below was definitive to answering this question?

P32 labeled DNA was left behind in the bacteria while S35 labeled protein left with the phage

Match to followed Theories of Heredity with their definitions.

Spontaneous Generation- living structures form without descent from similar organisms

Preformationism- proposed that an offspring developed from a pre-formed, miniature version of the adult organism contained within the egg or sperm

Acquired Characteristics- non-inheritable trait that arises during an organisms lifetime diet o environmental factors, experiences, or behavior, rather than being

encoded in its genes

Epigenesis- theory that embryo is not performed in the ovum or the sperm, but that it develops gradually by the successive formation of view parts from information passed down