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2024 STRAIGHTERLINE BIO 101 EXAM WITH CORRECT ANSWERS
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2024 STRAIGHTERLINE BIO 101 EXAM WITH CORRECT ANSWERS
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2024 STRAIGHTERLINE BIO 101EXAM WITH CORRECT
ANSWERS
Active transport requires - CORRECT ANSWERS-A carrier protein to pump a
substance against its concentration gradient
What steps are in the cell cycle? - CORRECT ANSWERS-Interphase, mitotic
phase, cytokinesis
What is the S-phase of the cell cycle? - CORRECT ANSWERS-S-phase, growth
and DNA replication
What is the G1 phase of the cell cycle? - CORRECT ANSWERS-Cell growth
What is the G2 phase? - CORRECT ANSWERS-Final preparation for mitosis,
produces all proteins needed for mitosis
What is the mitotic phase? - CORRECT ANSWERS-period of cell division
How many chromosomes do humans have? - CORRECT ANSWERS-46 (23
pairs) except in sex cells
What happens in prophase? - CORRECT ANSWERS--nuclear membrane
breaks down
-DNA condenses into chromosomes
What happens in metaphase? - CORRECT ANSWERS--Chromosomes line up in
the middle of the cell
-spindle fibers form and attach to centromeres
What happens in anaphase? - CORRECT ANSWERS--centromeres divide
-chromatids become one chromosome
-chromosomes migrate to opposite sides of cell
What happens in telophase? - CORRECT ANSWERS--cytokinesis occurs
-nuclear membrane forms in daughter cells
, Why is cytokinesis different in plant cells? - CORRECT ANSWERS-Because
plant cells have cell walls instead of cell membranes. Instead it forms a new
cell wall.
What do chromosomes in prokaryotic cells look like? - CORRECT ANSWERS-
Single ring shaped chromosome
What is a somatic cell? - CORRECT ANSWERS-body cell
The enzyme that brings in DNA nucleotides is called - CORRECT ANSWERS-
DNA polymerase
Haploid - CORRECT ANSWERS-Having one half of the chromosome
characteristics of a species
In meiosis, crossing over occurs in - CORRECT ANSWERS-Prophase 1
In meiosis, centromeres divide in - CORRECT ANSWERS-Anaphase II
At the end of meiosis II, how many cells are made - CORRECT ANSWERS-4
The phase between meiosis I and II is called - CORRECT ANSWERS-
Interkinesis
What is a test cross? - CORRECT ANSWERS-cross between an organism with
an unknown genotype and an organism with a recessive phenotype
What are autosomes? - CORRECT ANSWERS-All chromosomes of a genotype
except sex chromosomes
What are the bases in RNA - CORRECT ANSWERS-Adenine, Uracil, Guanine,
Cytosine
What is the sugar found in RNA? - CORRECT ANSWERS-Ribose
What are the 3 types of RNA - CORRECT ANSWERS-mRNA, tRNA, rRNA
What is point mutation? - CORRECT ANSWERS-Change in a single
nitrogenous base (sickle cell)
What is frame shift mutation? - CORRECT ANSWERS-Dramatic mutation from
addition or deletion of a base. (Cystic fibrosis)
How does cancer develop? - CORRECT ANSWERS-Proto-oncogenes mutate to
oncogenes followed by loss of tumor suppression gene function
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