In Texas Longhorn cattle, coat coloration is an inherited trait.
What is the genetic basis of coat-color variation (differences) in Texas Longhorn cattle?
A model of DNA is shown.
Which part of the DNA model is most directly associated with the coding of genetic information?
During the cell cycle, proteins called cyclins bind to enzymes that send signals for the cell to progress through stages of cell replication. At the end of this cycle, the cyclins degrade to prevent further signaling for the cell to divide.
Uncontrolled production of cyclins will most likely result in —
The diagram shows the major stages of the cell cycle and the percentage of time spent in each phase.
Which statement best describes why a cell spends the majority of its time in interphase?
Which table shows two steps of DNA replication?
Which table best compares the events that occur during different stages of the cell cycle?
The life cycle of a frog is illustrated in the diagram.
Which statement best explains how the cell cycle is important to the life cycle of the frog?
Scientists determine the total mass of DNA from a sample of animal cells. The masses of equal numbers of cells were taken during three different stages of the cell cycle. Stage I contains cells massed during G1 of the cell cycle.
Which statement best describes the cells during Stage II?
Throughout the cell cycle, the cell performs checkpoints to ensure that each phase is proceeding as normal. However, sometimes checkpoints are missed or fail.
During what stage of the cell cycle do mutations occur AND what is the result of mutations if the checkpoint is skipped or fails?
The base sequence of a segment of DNA is shown below.
DNA Template: 3' A - G - G - T - C - A 5'
Missing Sequence: 5' ____________________ 3'
Which option correctly shows the missing complimentary DNA sequence?
Make hotspot in SchoolCity
Dogs have 39 pairs of chromosomes in their somatic cells. In which part of the cell are these chromosomes replicated during the cell cycle?
Select ONE correct answer.
A student observed a human cheek cell under a light microscope and made these observations:
The chromatin is condensed.
There is no visible nucleolus.
The spindle fibers are visible.
The nuclear membrane looks like it is disappearing.
Which phase of the cell cycle is the student MOST LIKELY observing?
Normal cells have a contact inhibition feedback mechanism that prevents the cells from replicating when other cells are touched.
A diagram of cells with contact inhibition and cells without contact inhibition is shown.
Which statement best describes what will happen to the cells in an organism that lacks contact inhibition?
The pancreas secretes insulin, a small globular protein, that allows the body to regulate levels of sugar in the blood. What factor most directly determines the amino acids that are combined to create insulin?
Biomolecules / Cell Transport (technically)
Cells USE
Ash - Here is what I see so far (not including the recursive items)
7A - 4 items (3 easy, 1 medium, 0 hard) - readiness
6A - 7 items (2 easy, 2 medium, 3 hard) - readiness
6C - 4 items (1 easy, 2 medium, 1 hard) - supporting
*We don't have any SCR items on the test and I think we should be in the practice of asking one each test to build student confidence and expertise with that.
I also looked at the knowledge/skills tables we created and found we didn't have items aligned to the following:
7A
Structure of DNA in terms of double helix, backbone and nitrogenous bases (medium)
components of a nucleotide (easy)
Significance of hydrogen bonding (hard)
Identify the components from an image (hard)
interpret multiple models of DNA (I think this one is actually part of the one above)
Origin of DNA (hard)
6A
cell division creates two identical daughter cells (easy)
sequence of replication (hard) --this is on the quiz
6C
cell cycle disruptions can be caused by mutations during S phase (medium)
predict the outcome if the cell cycle is disrupted (hard) ---also on the quiz
I will pull some additional 7A items in the hard category since that is a readiness standard for sure. I may also look for some other options of other items for the other TEKS as well.
Below are the additional items I pulled for possible addition to the test that address the gaps above.
A part of a DNA nucleotide is shown.
What is missing in the structure of the DNA nucleotide?
What components make up a nucleotide of DNA?
Select THREE correct answers.
Which of the following holds the two strands of a DNA double helix together?
Scientists have long theorized about the origins of the DNA molecule. Where do scientists think that DNA originated from?
A model of DNA structure is shown.
Select the option that correctly labels the diagram, in order from 1–4.
A student produced a model to demonstrate the cell cycle and its importance in the development of cancer cells.
Exposure to radiation at which location on the model may cause cancer cells to develop due to mutations?
A group of students places information about the stages of the cell cycle into a table.
Which information should be added to the table?
Cells pass through a G2 checkpoint before entering mitosis. Ideally, if DNA damage is detected, the cells do not enter mitosis until the damage is repaired.
Why is DNA damage repaired before cells enter mitosis?
The diagram below illustrates the steps of DNA Replication.
What is the purpose of DNA Replication?
When considered together, what do the blue and green portions of the molecule represent?
Add red box around phosphate and sugar
