Question

Question 25
Original DNA: TAC CTA GGA CCA ACT has changed to TAC CTA GAC CAA CT.

What type of mutation has occurred, and has it caused a frameshift?

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a
insertion - no
b
translocation - yes
c
deletion - yes
d
substitution- no
Question 26
Which of the following is found in viruses and NOT in cells?



a
nucleolus
b
ribosomes
c
protein capsid
d
cytosol
Question 27
Mustard gas removes guanine from DNA. For developing embryos, exposure to mustard gas can cause serious deformities because guanine

a
produces energy for DNA replication.
b
stores the building blocks of proteins.
c
directly causes mutations in DNA.
d
is one of the four nitrogenous bases in DNA.
Question 28
Match each type of tropism (Column A - Question) with the correct stimulus and plant response (Column B - Answer).

Each answer may be used once, more than once, or not at all.

Make like a plant and BLOOM!



Column A
1.
Phototropism:
Phototropism
2.
Gravitropism (Geotropism):
Gravitropism (Geotropism)
3.
Thigmotropism:
Thigmotropism
4.
Hydrotropism:
Hydrotropism
Column B
a.The leaves of a plant dropping in the Fall
b.A vine wrapping around a fence post
c.Roots growing downward into the soil due to gravity
d.Roots growing toward higher water concentration in soil
e.A plant stem bending toward sunlight
Question 29
Some components of cells are listed.

Cytoplasm
Nucleus
Chloroplasts
Cell Wall
Cell membrane
Which of the components could be observed using a microscope in a prepared slide of leaf epidermal cells, but not in a prepared slide of human cheek cells?

a
Components 2 and 3 only
b
Components 1 and 5 only
c
Components 3 and 4 only
d
Components 1, 2, and 3 only
Question 30
An error in Meiosis (or Mitosis) leading to the wrong number of chromosomes is called _______________.



a
nondisjunction
b
point mutation
c
oopsy
d
replacement

Answer 1

Here are the answers (with brief notes where helpful):

Question 25: c — deletion; yes (one nucleotide deleted, causing a frameshift)

Question 26: c — protein capsid

Question 27: d — is one of the four nitrogenous bases in DNA

Question 28:
1. Phototropism — e (stem bends toward sunlight)
2. Gravitropism — c (roots grow downward due to gravity)
3. Thigmotropism — b (vine wraps around a post)
4. Hydrotropism — d (roots grow toward higher water concentration)

Question 29: c — Components 3 and 4 only (chloroplasts and cell wall)

Question 30: a — nondisjunction