NEW
Font size
WorksheetsUnit 4 Cell Communication and Cell Cycle Review
Total questions: 12
Worksheet time: 6mins
Antigen presenting cells in the human immune system work with T cells to kill invading pathogens (bacteria and viruses). Antigen presenting cells will identify the pathogen and present the antigen, which is a unique protein 'name tag' of the pathogen, to the T Cell so that the T cell can find and kill the pathogen. This type of communication between the antigen presenting cell and the T cell is known as...
Direct contact
Local signaling
Long distance signaling
Transduction signaling
Scientists have hypothesized that rinsing fruit in a salicylic acid solution may damage ethylene receptors in the fruit. If these plants were then exposed to ethylene gas what results would you expect to see if the researcher's hypothesis was supported?
The fruit would die immediately because of the damaging effects of the salicylic acid.
The fruit would ripen quicker after exposure to the ethylene gas than in comparison to the negative control because the receptors would be more readily able to bind to the ethylene gas thereby initiating the signal transduction cascade.
The fruit would ripen slower after exposure to the ethylene gas than in comparison to the negative control because the receptors would be made non-functional and therefore could not bind to ethylene gas and undergo the conformational change needed to initiate the transduction process.
None of the above would support the hypothesis of the researcher.
Which of the following options best describes the function of the enzyme protein kinase?
It phosphorylates molecules inside of the cell.
It reduces the transduction signal to lessen the response of the cell
It reduces the levels of cAMP
It activates protein phosphatase molecules
What structures do plants utilize to share information between adjacent cells?
Gap junctions
Connexins
Plasmodesmata
Grana
The state of relatively stable internal conditions is known as...
Set points
Homeostasis
Equilibrium
Stability
A type of feedback that reduces the effect of the stimulus is known as...
Negative feedback
Positive feedback
Neutral feedback
Maintenance of set point
Which of the following sequences correctly orders the phases of the cell cycle?
G1⇒S ⇒G2→ Prophase → Prometaphase → Metaphase → Anaphase → Telophase → Cytokinesis
S→ G1 → G2→ Prometaphase → Metaphase → Anaphase → Telophase → Cytokinesis
G1⇒S →G2→ Prophase → Anaphase → Metaphase → Telophase → Cytokinesis
G1⇒ G2 → S➜ Prophase → Metaphase → Anaphase → Telophase → Cytokinesis
Which of the following is not true regarding diploid cells?
Diploid cells contain two sets of chromosomes (one from mom, one from dad)
Diploid cells divide by mitosis
Diploid cells include sex cells (egg and sperm cells)
The diploid number for humans is 2n = 46
What are homologous chromosomes?
After DNA replication, each chromatid has an identical copy, these identical copies are homologous chromosomes.
Homologous chromosomes are two similar chromatids connected together at the centromere.
Chromosomes from mom that are the same length and centromere position as chromosomes from dad are known as homologous chromosomes.
When DNA wraps around histones and condenses it forms homologous chromosomes.
Examine the image of cells going through mitosis.
What stage is cell A currently in?
Metaphase
Telophase
Anaphase
Prophase
Examine the image of cells going through mitosis.
What stage is cell B currently in?
Metaphase
Telophase
Anaphase
Prophase
Examine the image of cells going through mitosis.
What stage is cell C currently in?
Metaphase
Telophase
Anaphase
Prophase
