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A_Biology Sem-2 Final

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Last updated 25 days ago
46 questions
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Question 1
1.

Match the DNA base with its complementary partner in the DNA strand.

Draggable itemarrow_right_altCorresponding Item
Cytosine (C)
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Thymine (T)
Adenine (A)
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Cytosine (C)
Guanine (G)
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Guanine (G)
Question 2
2.

Associate the following genetic components with their correct descriptions.

Draggable itemarrow_right_altCorresponding Item
Double Helix
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Five-carbon sugar in RNA
Nucleotide
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Structure of DNA resembling a twisted ladder
Ribose
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Consists of sugar, phosphate, and a nitrogen base
Question 3
3.

Which of the following correctly distinguishes RNA from DNA?

Question 4
4.

A strand of RNA has the sequence AUUGCGGAA. Explain what caused this strand to be made.

Question 5
5.

Match the type of mutation to its description.

Draggable itemarrow_right_altCorresponding Item
Deletion mutation
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Change in a single nucleotide sequence.
Point mutation
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Addition of one or more nucleotide bases.
Insertion mutation
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Removal of one or more nucleotide bases.
Question 6
6.

Match the type of mutation to its potential effects.

Draggable itemarrow_right_altCorresponding Item
Beneficial mutation
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Causes disease or reduced fitness.
Harmful mutation
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Has no significant impact on fitness.
Neutral mutation
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Gives an advantage to the organism.
Question 7
7.

Luna is studying the different types of RNA that play a role in protein synthesis. Match the type of RNA to it's appropriate description.

Draggable itemarrow_right_altCorresponding Item
mRNA
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carries transcribed code for a protein
tRNA
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carries amino acids to ribosomes
rRNA
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forms subunits of ribosomes
Question 8
8.

The model below shows the structure of two molecules. Which statements about the two structures seen in the model are correct? Choose TWO correct answers.

Question 9
9.
A mutation that happens when a single nucleotide is replaced by a different one is a __________ mutation, also known as a substitution mutation. A mutation caused by the loss of a nucleotide in the DNA sequence is known as a(n)__________ mutation. This is a type of __________mutation because it causes a change in the reading frame of the DNA.
Question 10
10.

Categorize the descriptions to the correct label

  • occurs in the ribosome
  • decodes mRNA to amino acids
  • copies DNA and forms mRNA
  • occurs in the nucleus
  • Transcription
  • Translation
Question 11
11.
Using the chart as reference, choose the correct response to complete the sentence.

__________ in a DNA sequence would correspond to a “stop” codon.
Question 12
12.
Using the chart as reference, choose the correct response to complete the sentence.

__________ in an RNA sequence would lead to the polypeptide chain valine-methionine-phenylalanine.
Question 13
13.

What is it called when chromosomes swap DNA? During what phase of meiosis does this process happen?

Question 14
14.

Drag and drop the description to the category that it belongs to.

  • Two daughter cells with haploid number of chromosomes is formed.
  • Chromosomes align at the equator single file
  • Homologous chromosomes align at the equator.
  • Four daughter cells with haploid number of chromosomes is formed.
  • Meiosis-I
  • Meiosis-II
Question 15
15.

Match the image with the correct phase name-

Anaphase-I
Metaphase-I
Crossing Over
Question 16
16.

The number of chromosomes in muscle cells of a coyote are 40. What will be the number of chromosomes in its sperms.

Question 17
17.
Haploid gametes have __________# of chromosomes whereas Diploid cells have __________# of chromosomes
Question 18
18.

One difference between Autosomes and sex chromosomes humans is-

Question 19
19.

In goats, the allele for horns (H) is dominant to the allele for no Horns (h). Both parents are hybrids (Hh) for horns. What is the percent chance that the offspring will have horns?

Question 20
20.

Match the explanation with the vocab word.

Draggable itemarrow_right_altCorresponding Item
When the pair of alleles are different
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Allele
The alternative form of a gene
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Genotype
The outward appearance of an organism
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Phenotype
When the pair of alleles are same
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Homozygous
The genetic constitution of an organism
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Heterozygous
Question 21
21.

R = able to roll tongue
r = unable to roll tongue
One brother has genotype RR and the other brother has genotype Rr.
Which statement is true about these two brothers?

Question 22
22.

If a man has blood type homozygous A and his wife has blood type AB, what blood types are possible among their children?

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Question 23
23.

The image alongside is an example of-

Question 24
24.

A calico cat shows both the traits for orange fur and black fur. What kind of allele expression is this?

Question 25
25.

If a Hemophilic male (XhY) has children with a carrier female (XhX) what is the possibility of the couple having a hemophilic child?

Question 26
26.

Match the vocab with correct description-

Draggable itemarrow_right_altCorresponding Item
a pattern of inheritance where multiple genes work together to control a single trait
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Polygenic traits
different versions of a gene that exist in a population. (Ex. Blood type)
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Multiple alleles
A trait controlled by genes on X-Chromosomes
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Sex linked traits
Question 27
27.

Match the categories with the correct description-

  • Farmers have selectively bred wheat and rice for higher yields, disease resistance, and other desirable traits
  • Giraffe necks evolving longer to reach leaves high in trees.
  • Cattle have been bred for increased milk production, meat quality, and overall size.
  • Beaks of finches adapting to different food sources.
  • Artificial Seclection
  • Natural Selection
Question 28
28.

A scientist presented the information in the illustration as part of a report on the evolution of species. How does the information support the claim of common ancestry?

Question 29
29.

Match the type of evidence to its explanation.

Draggable itemarrow_right_altCorresponding Item
Fossils
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Study of species distribution.
Molecular biology
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DNA and protein similarities in organisms.
Embryonic development
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Remains of organisms from the past.
Biogeography
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Similar stages of development in embryos.
Question 30
30.

A researcher recently discovered a new species of bacteria in the body of a tubeworm living near a hydrothermal vent. He compared the DNA of this new bacterial species to the DNA of four other species of bacteria. The DNA sequences came from the same part of the bacterial chromosome of all four species.

According to these data, the unknown bacterial species is most closely related to

Question 31
31.

Categorize the following statements as either "Scientific Theory" or "Hypothesis".

  • Based on extensive evidence.
  • Proposes a specific prediction.
  • Must be tested for validity
  • Recognized by scientific community
  • Scientific Theory
  • Hypothesis
Question 32
32.

What does the term 'gene pool' refer to?

Question 33
33.

Some organisms have features that have different functions, but similar structures. One example is the forelimb of humans, dogs, birds, and whales.

Question 34
34.

How do fossils support evolution?

Question 35
35.

Examples of analogous structures include

Question 36
36.

Match the mechanism of evolution to its definition.

Draggable itemarrow_right_altCorresponding Item
Natural selection
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Survival and reproduction of best adapted organisms.
Gene flow
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Movement of alleles between populations.
Genetic drift
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Random changes in allele frequencies in small populations.
Question 37
37.

What mechanism of evolution is shown below-

Question 38
38.

Select the statement that is true for evolution.

Question 39
39.

The model below shows a how populations of organisms can change. Which of the following concepts is best illustrated by this demonstration?

In a population of beetles, there is a variation in shell color—some are green, while others are brown. Birds, the main predators of these beetles, tend to spot and eat green beetles more easily in environments with brown soil and dry leaves. Over time, researchers have noticed that the population of brown beetles has increased, while the number of green beetles has decreased.
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Question 43
43.

Carrying capacity refers to:

Question 44
44.

A population of 2,000 deer lived on a plateau. In 1906, all hunting of the deer was banned, natural predators were exterminated, and sheep and cattle, which competed with the deer, were banned from the plateau. The graph shows the deer population in the years following this.

Which statement regarding factors affecting deer population is supported by the data in the graph?

Question 45
45.
When the fish population is well below the carrying capacity of the lake, the population would be expected to show a pattern of __________ growth, which means that the rate of population change will __________ over time. As the population approaches carrying capacity, the growth rate would be expected to show a pattern of __________ growth, which means the population would __________.
Question 46
46.

Determine if the following scenarios represent density dependent or density independent limiting factors.

  • A large number of moose die from a rare bacterial infection that spreads through the population.
  • This year, Anne was excited about planting another tomato garden. Two weeks after planting seeds, the weather turned cold. A frost killed most of the seedlings, and Anne had to plant new ones.
  • A population of bass is growing quickly in a freshwater lake. Then a parasitic protozoa invades the lake, infecting the bass. The parasite spreads quickly to other fish.
  • Density Dependent
  • Density Independent
Question 40
40.

Which of the following best explains the change in the beetle population over time?

Question 41
41.

The change in the beetle population over time is best explained by which biological concept?

Question 42
42.

If the environment changes and the ground becomes green due to moss growth, what is the most likely outcome for the beetle population over time?