Lecture 8,9,10,11 Flashcards
In the laboratory, you are given samples of brown algae. Since these organisms are protists, which of the following characteristics would you assume is true?
Select one:
a. Brown algae are marine
b. Brown algae are unicellular
c. Brown algae are photosynthetic organisms
d. Brown algae have membrane-bound organelles
e. Brown algae have a single circular molecule of DNA
C.
What happens during G1?
Select one:
a. Cell division
b. Mitosis
c. DNA replication
d. Normal cell growth and function
e. A gap (nothing)
D
Which of the following correctly matches a phase of meiosis with its description:
Select one:
a. Metaphase I: Homologous chromosomes line up at the metaphase plate
b. Telophase I: Nuclear envelope breaks down
c. Prophase II: crossing over
d. Anaphase II: Homologous chromosomes move toward opposite poles
e. A and C
f. A and D
A
Which of the following defines a genome?
Select one:
a. Representation of a complete set of a cell’s polypeptides
b. The complete set of an organism’s polypeptides
c. The complete set of a species’ polypeptides
d. A karyotype
e. The complete set of an organism’s genes
E
Prokaryotes’ genetic information is carried in the:
Select one:
a. Nucleoid Correct
b. Nucleolus
c. Nucleus
d. Organelles
e. Plasmids
A
The centrosome is a region in which
Select one:
a. Chromatids remain attached to one another until anaphase
b. Homologous chromosomes remain attached to one another during crossing over
c. the spindle microtubules begin to form
d. Chromosomes attach to the spindle microtubules
e. Sister chromatids remain attached to one another until metaphase
C
Which of the following can occur by the process of meiosis but not mitosis?
Select one:
a. Haploid cells multiply into more haploid cells
b. A diploid cell combines with a haploid cell
c. Haploid cells fuse to form diploid cells
d. Diploid cells multiply into more diploid cells
e. Diploid cells form haploid cells
E
If there are 20 centromeres in a cell at anaphase (mitosis), how many chromosomes are there in each daughter cell following cytokinesis?
Select one:
a. 10
b. 20
c. 30
d. 40
e. 80
A
The thermoacidophile Sulfolobus acidocaldarius lacks peptidoglycan, but still possesses a cell wall. What is likely to be true of this species?
- It is a bacterium.
- It is an archaean.
- The optimal pH of its enzymes will lie above pH 7.
- The optimal pH of its enzymes will lie below pH 7.
- It could inhabit certain hydrothermal springs.
- It could inhabit alkaline hot springs.
Select one:
a. 1, 3, and 6
b. 2, 4, and 6
c. 2, 4, and 5
d. 1, 3, and 5
e. 1, 4, and 5
C
Which of the following is true of a species that has a chromosome number of 2n = 8?
Select one:
a. A gamete from this species has two chromosomes
b. The species has 8 sets of chromosomes per cell
c. The species is diploid with 16 chromosomes per cell
d. Each cell has four homologous pairs
e. During the S phase of the cell cycle, there will be 16 separate chromosomes
E
