Biomolecules Questions and Answers

x In an experiment to study the breakdown of protein a student uses the enzyme amylase and an indicator What could be a reason why there i no change in color A B C D The indicator inhibits the reaction between protein and amylase by occupying the active sites of the enzyme Protein reacts instantly with amylase and this change cannot be detected by the indicator The indicator becomes inactive upon reacting with protein and cannot indicate the formation of the products Protein does not react with amylase as it cannot fit into the active sites present in amylase

Scientists routinely explore whether two different animal species have evolved from a recent common ancestor LEAST useful technique to help with this determination A 4x B C D Studies of embryos during development Comparisons of items eaten for food Comparisons of bones and muscles Analysis of strands of DNA

Which situation is an example of a human induced environmental change affecting a population Floods from a storm forced many white tailed deer to move to a new habitat A fisher caught a few different species of fish that live in an ocean habitat A volcanic eruption killed grasses that were growing within a few miles of the volcano Blue jays no longer live in a forest because the trees in the forest were cut down

transcription Which process does this diagram illustrate DNA replication translation

Cancer is caused by a change in DNA What is a change or damage to DNA called tercation Mutation Replication Abberation

The human body maintains a temperature of around 98 6 degrees at all times Enzymes are involved in almost every chemical reaction in the body Which of the following describes the connection between these two statements The body is kept relatively warm to prevent too much enzyme action Enzymes function best There is no connection at a specific between the two temperature statements The body needs to be warm to prevent hypothermia

Sequence 1 Met Trp Gin His Phe Ser Asn Sequence 2 Met Tip Gin His His Glu Ser Sequence 3 Met Trp Arg His His Glu Ser Sequence 4 Met Ala Gin His His Glu Ser Sequence 5 Met Ala Gin His His Glu Ser Sequence 6 Met Tip Gin His Glu Ser Asn Sequence 3 and 4 Analyze the amino acid sequences for a protein found in 6 different species Which two species are most closely related based on sequence similarities Sequence 1 and 2 Sequence 4 and 5 Sequence 1 and 6

Protein degradation can be reversed in a process called A rehydration B restoration C renaturation Dunification

The structure of enzymes that just includes folding and is caused by hydrogen bonding only is called a structure A secondary B tertiary C quaternary D primary

Cteria An example of an unicellular organism would be human monkey spide

How are DNA and RNA different CHECK ALL THAT APPLY y DNA can leave the nucleus Select all correct options MSQ DNA contains Thymine RNA contains Uracil DNA is double stranded RNA is a single stranded RNA contains Thymin DNA contains Uracil

woman who carries an allele for a sex linked recessive trait has a daughter with a man who do not carry the allele What is the percent probability the daughter will express the trait

Plants or plant like organisms that make their own food using energy from the sunlight

Which macromolecule found in the food you eat will your cells break down first to get ATP Lipids Nucleic Acids Carbohydrates Proteins

When molecules are catabolized it is called an exergonic reaction and free energy and enthalpy while entropy A decrease B multiply C increase D equalize

Brown fat found in small hibernating animals and infants has a protein that acts like DNP We would therefore expect brown fat to heat production because Decrease it is more dense that regular white fat This limits O2 diffusion thereby decreasing the rate of aerobic metabolism and therefore heat generation Decrease it contains more mitochondria This increases the efficiency with which glucose catabolism is coupled to ATP Synthesis and therefore less of the chemical energy of catabolism is lost as heat Increase it is more dense than regular white fat so it is a better temperature insulator By maintaining the temperature of the organism closer to the optimal temperature for enzymes metabolism and therefore heat generation is maintained Increase it contains a protein that forms a pore in the inner mitochondrial membrane This allows H to diffuse down its gradient without the energy being captured and coupled to ATP Synthesis The energy is lost as heat

Which of the following is a direct cellular consequence of Maturation promoting factor MPF activity DNA replication Cell growth Formation of the mitotic spindle All of the above

Endosymbiosis states that free living were engulfed and became the of the eukaryotes we see today A eukaryotes B cholorplasts C prokaryotes D cristae

Flagella are means for prokaryotes to A gather food B expedite digestion C be motile D be sessile

sexual reproduction Jaguars with slightly larger jaws and teeth are better able to eat shelled reptiles in addition to mammals These Jaguars are likely to survive longer and leave more offspring than jaguars that eat only mammals Which scientific concept explains how large jaws and teeth became typical characteristics of jaguars biogeography artificial selection natural selection

phatic tem A preparation of dead or weakened pathogens that is introduced into the body to cause an immune response immune system vaccine Lymphocytes inflammation

4 points A student places a lidded pot of water onto a burner on the stove They turn the stove burner on and set it to medium high The student watches and makes observations Student Observations 1 The water starts to boil 2 The water becomes a gas 3 The gas can be seen as steam as it escapes from under the lid of the pot 4 The escaped gas does not keep a shape and appears to quickly disappear in the room The student claims that changing the temperature of the water causes a physical change that turns water into water vapor Which argument BEST supports the student s claim Water vapor forms because heat is removed causing the particles to move slower This makes the water change its shape Water vapor forms because heat is removed causing the particles to move slower This changes the water from a liquid to a gas Water vapor forms because heat is added causing the particles to move faster This makes the water change from a liquid to a gas Water vapor formis because heat is added causing the particles to move faster This changes the color of the water making it transparent

Lab 3 Chemical Composition of Cells Assignment Click the following link to study the Concepts of macromolecules biomolecules Biomolecules Updated YouTube Then read the attached Lab 3 Background Materials 1 and 2 to understand how to conduct the tests of Carbohydrates Fates Proteins and Foods Also watch this video https www youtube com watch v gzvkuX4vY04 After that fill the following table based on the tests results Test of Carbohydrate Table 1 Benedict s test for Sugar Tube 1 2 Table 2 lodine Test for Starch Tube Content 1 Water 2 Starch solution Content Water Glucose solution Test of Protein Table 3 Biuret Test for Protein LEN Tube 1 2 Content Water Protein solution Test of Fats Table 4 Sudan IV Test for Fats Tube 1 2 Content Water Vegetable oil Color After Heating Conclusion Final Color Final Color Final Color Conclusion Conclusion Conclusion

ou are analyzing a compound in the laboratory You find that it is made up of carbon hydroge and oxygen in a ratio of two hydrogen atoms for each carbon atom How will you classify the compound lipid carbohydrate protein nucleic acid

1 and what turning point major event does the beginning date of this period represented What turning point major event does the ending date of this period represented what might a title for this period be 1f If you had to choose another beginning and ending date for this period what would it be and why

Which of the following is NOT a form of membrane transport A Osmosis B Sugar osmosis C Cotransport D Bulk transport

Which of the following can change the fluidity of a cell membrane A Water saturation B DNA C Cholesterol D Carbohydates

Five True False questions 1 2 of body weight Present cells Lipids 2 True False Carbon containing molecules

1 What molecules studied in this lab are present in cells 2 To build a protein what building block would you use 3 How would you test an unknown solution for each of the followings a Sugars b Fat c Starch d Protein 4 Why in many of these tests is water used instead of a sample substance

1 2 3 4 5 lodine Lipid Iron Type of Monosaccharides Protoplasm

reprod rapidly in their new habitat displaced other animals and overgrazed vegetation In an attempt to reduce the rabbit population a virus was introduced in 1951 This virus is usually deadly to European rabbits When the virus was first introduced the rabbits died in large number but the death rate decreased over time Which of the following best explains the decrease in rabbit death rate oung rabbits learned to avoid being infected with the virus The lifespan of the virus is too short to affect rabbits over a ling period of time Natural selection favored rabbits that are resistant to this virus

Imagine that you cross two plants that are heterozygous for tall stems and round seeds TtRr What ratio would you expect to find between offspring expressing both dom stems and round seeds and those offspring expressing both recessive phenotypes short stems and wrinkled seeds O 2 1 O 9 1 O 3 1 O 3 3 1 1

TT and tt would be examples of Genotype A True B False

What molecule contains the codon A mRNA B tRNA C rRNA D Template strand of DNA

6 What color change in the phenol red solution do you expect to see when the germinating mung beans are incubated with phenol red 7 What color change in the phenol red solution do you expect to see when the non germinating mung beans are incubated with phenol red 8 What color change in the phenol red solution do you expect to see when the cold germinating mung beans are incubated with phenol red How will this result be different from that of the germinating beans at room temperature 9 What will cause the color of phenol red to change

The boundary between the crust and the mantle is known as O the Moho a tectonic plate O the asthenosphere

According to Table 12 1 on page 284 of the lab manual has a hardness of 3 O apatite O apatite O calcite

Q010 The following happens when a G protein coupled receptor activates a G protein a The subunit exchanges its bound GDP for GTP O b The GDP bound to the a subunit is phosphorylated to form bound GTP O c The subunit exchanges its bound GDP for GTP d It activates the a subunit and inactivates the By complex

Q008 Foreign substances like nicotine morphine and menthol exert their initial effects by O a diffusing through cell plasma membranes and binding to transcription factors to change gene expression O b interacting with cell surface receptors causing the receptors to transduce signal inappropriately in the absence of the normal stimulus O c removing cell surface receptors from the plasma membrane O d killing cells immediately exerting their physiological effects by causing cell death

Which of the following statements is correct about the reaction 1 on page 27 of the lab manual Hint assigning oxidation numbers to the elements in this reaction will help you answer the question correctly Select one O Hydrogen is oxidized and zinc is reduced during the reaction O Hydrogen is reduced and zinc is oxidized during the reaction O Chlorine is reduced and zinc is oxidized during the reaction O Chlorine is reduced and hydrogen is oxidized during the reaction O Hydrogen and chlorine are reduced and zinc is oxidized during the reaction

The citric acid cycle is outlined below Some of these reaction the activated carrier X produced at step 3 of the cycle

For every decade beyond the age of 30 what is the percentage decrease in the need for total Kcalories O O 2 5 10

Which two minerals are critical for athletes O Sodium and potassium Iron and Calcium O Calcium and Phosphorus O B12 and Folate

Gastric Bypass surgery is recommended for only people with a BMI greater than O 35 30 40 25

Under the fat cell metabolism theory if you have more of this enzyme you have greater fat storage O Leptin O Lipoprotein Lipase Serotonin Uncoupling proteins

One unit of pyruvate contains how many carbons O 1 02 O 3

One unit of glucose yields how many units of pyruvate 0 1 02 0 3 04

The pathway from pyruvate to Acetyl CoA is irreversible O True O False

After the first day of fasting which of the following is most depleted by the body O Glycogen Fatty acids Amino acids Triglycerides

The production of glucose from the glycerol backbone is a catabolic reaction True False