Biology : ALPHA || Mohammad Alrousan ❤
Explore Your Biology Knowledge!
Welcome to the Biology: ALPHA quiz! This engaging quiz is designed to test your understanding of various biological concepts, from adaptive immunity to the intricacies of DNA and genetics. Sharpen your skills and gain deeper insights into the fascinating world of biology.
Whether you're a student, a teacher, or simply a biology enthusiast, this quiz offers:
- 31 thought-provoking multiple-choice questions
- Detailed explanations for each answer
- A fun way to assess your biology knowledge
Which of the following is a characteristic of adaptive immunity?
It has the ability to detect very specific pathogens
Responses are the same whether or not the pathogen has been previously encountered
Responses are active immediately upon infection
It is found only in invertebrates
It is common to all animals
The human genome is minimally contained in which of the following?
Every human cell
Each human chromosome
The entire DNA of a single human
The entire human population
What was the most significant conclusion that Gregory Mendel drew from his experiments with pea plants?
There is considerable genetic variation in garden peas.
Traits are inherited in discrete units, and are not the results of "blending."
Recessive genes occur more frequently in the F1 generation than do dominant ones.
Genes are composed of DNA.
How do we describe transformation in bacteria?
The creation of a strand of DNA from an RNA molecule
The creation of a strand of RNA from a DNA molecule
The infection of cells by a phage DNA molecule
Assimilation of external DNA into a cell
The large surface area in the gut directly facilitates ________.
Secretion
Absorption
Filtration
In humans, the first line of defense against infection is ______
The cell-mediated response
The skin and mucous membranes
The humeral response
Adaptive immunity
The inflammatory response
Which of the following defines a genome?
Representation of a complete set of a cell's polypeptides
The complete set of an organism's polypeptides
The complete set of a species' polypeptides
The complete set of an organism's genes
How many unique gametes could be produced through independent assortment by an individual with the genotype AaBbCCDdEE?
4
8
16
32
Cytosine makes up 42% of the nucleotides in a sample of DNA from an organism. Approximately what percentage of the nucleotides in this sample will be thymine?
8%
16%
31%
42%
In the digestive system, peristalsis is
a process of fat emulsification in the small intestine.
Voluntary control of the rectal sphincters regulating defecation.
The transport of nutrients to the liver through the hepatic portal vessel
Smooth muscle contractions that move food along the esophagus
Which of the following cells are part of the innate, second line of defense?
Macrophages
Platelets
Cytotoxic T cells
B cells
At which stage of mitosis are chromosomes usually photographed in the preparation of a karyotype?
Prophase
Metaphase
Anaphase
Telophase
Two plants are crossed, resulting in offspring with a 3:1 ratio for a particular trait. What does this suggest?
That the parents were true-breeding for contrasting traits
That the trait shows incomplete dominance
That a blending of traits has occurred
That the parents were both heterozygous for a single trait
Hershey and Chase set out to determine what molecule served as the unit of inheritance. They completed a series of experiments in which E. Coli was infected by a T2 virus. Which molecular component of the T2 virus actually ended up inside the cell?
DNA
RNA
Protein
Ribosome
An enzyme with high activity in an acidic environment is
Amylase.
Pepsin.
Gastrin.
Trypsin.
Local swelling, increased blood flow, and fever are all parts of __________
Passive immunity
An inflammatory response
Humoral immunity
Active immunity
Which of the following is true of a species that has a chromosome number of 2n = 16?
The species is diploid with 32 chromosomes per cell.
The species has 16 sets of chromosomes per cell.
Each cell has eight homologous pairs
During the S phase of the cell cycle there will be 32 separate chromosomes.
Mendel accounted for the observation that traits which had disappeared in the F1 generation reappeared in the F2 generation by proposing that
New mutations were frequently generated in the F2 progeny, "reinventing" traits that had been lost in the F1
The mechanism controlling the appearance of traits was different between the F1 and the F2 plants.
Traits can be dominant or recessive, and the recessive traits were obscured by the dominant ones in the F1
The traits were lost in the F1 due to dominance of the parental traits.
An Okazaki fragment has which of the following arrangements?
Primase, polymerase, ligase
3' RNA nucleotides, DNA nucleotides 5'
DNA polymerase I, DNA polymerase III
5' RNA nucleotides, DNA nucleotides 3'
When the digestion and absorption of organic molecules results in more energy- rich molecules than are immediately required by an animal, the excess is
Eliminated in the feces.
Stored as starch in the liver.
Stored as glycogen in the liver and muscles.
Oxidized and converted to ATP.
Hydrolyzed and converted to ADP.
Which type of cell is responsible for causing apoptosis in cancer cells and virus-infected cells?
Natural killer cells
Plasma cells
Helper T cells
Dendritic cells
None of the listed responses is correct
The homologous chromosomes are:
Have the genes controlling the same inherited characters
Have the genes controlling different inherited characters
Found in gametes
All of the above
In Tay - Sachs disease, what is the type of dominance at organismal level?
Incomplete dominance
Multiple alleles
Complete dominance
Epistasis
In a nucleosome, the DNA is wrapped around
Polymerase molecules.
Ribosomes.
Histones.
A thymine dimer.
Antibodies are in which class of proteins?
Receptor
Pathogens, agents that cause disease, infect a wide range of animals, including humans
T
F
Antigens are substances that can elicit a response from a B or T cell
F
T
The two ventricles have relatively thin walls and serve as collection chambers for blood returning to the heart
F
T
The cardiac output is the volume of blood pumped into the systemic circulation per minute and depends on both the heart rate and stroke volume
T
F
Red blood cells, or erythrocytes, are the most numerous blood cells
T
F
I wish you all the best, my friends
Mohammad Alrousan ❤
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