Question

7. Fermentation can be used by

Group of answer choices

fungi

bacteria

animals

all of the above

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Question 84 pts

8. CO₂ is one of the products of aerobic cellular respiration

Group of answer choices

True

False

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Question 94 pts

9. Enzymes are proteins which control chemical reactions in living things. Wrong pH can cause enzyme _______________ and stop releasing of ___________

Group of answer choices

synthesis , products

denaturation, substrates

decomposition, products

denaturation, products

denaturation, substrates

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Question 104 pts

10. Green plants use oxygen _______________ and release oxygen _______________

Group of answer choices

when it's dark, all the time

all the time, when exposed to light

all the time, when it's dark

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Question 114 pts

11. Parents with attached earlobes cannot have children with free earlobes

Group of answer choices

True

False

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Question 124 pts

12. Which genotype is for individual with the lightest skin?

Group of answer choices

abc

AABBCC

ABC

AabbCc

AabbCC

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Question 134 pts

13. What is WRONG about DNA? DNA _________________

Group of answer choices

has A, U, C, G nucleotides

is duplicated during interphase

carries genes

has two strands connected via hydrogen bonds

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Question 144 pts

14. Viruses can have DNA or RNA in their core and use ______ as their hosts

Group of answer choices

humans

plants

animals

bacteria

all of the above

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Question 154 pts

15. Cherry trees are in bloom in March, and magnolia trees are in bloom in May. This can be an example of __________________reproductive barrier

Group of answer choices

prezygotic, habitat isolation

postzygotic, hybrid infertility

postzygotic, temporal isolation

prezygotic, temporal isolation

Answer 1

Q7. Ans is option D.

Fermentation is a process of energy generation by converting carbohydrates to ethyl alcohol in the absence of oxygen. This process can be seen in fungi, bacteria and muscle cells of animals.

Q8. Ans is option A.

Carbon dioxide is an end product of aerobic respiration, Aerobic restoration has three phases. Glycolysis - occurs in the cytoplasm, no CO2 produced, oxidative decarboxylation - occurs in mitochondria, CO2 is produced and Kreb's cycle and electron transport chain - occurs in mitochondria and CO2 is produced.

Q9. Ans is option C.

Every enzyme acts maximally at an optimum pH. For example, pepsin acts at pH 2, trypsin at pH 8. Now, when the surrounding pH changes, the activity of the enzymes changes gradually on both sides of the pH of maximal activity.. If there is extreme pH in the surrounding environment, then the enzymes get denaturated and release of products are stopped.

Q10. Ans is option B.

Respiration occurs 24 hours and is required for complete oxidation of flood material to generate energy. This is required to maintain the living condition of a cell. Thats why plants use oxygen throughout the day.

The photosynthesis is a process, which uses carbon di oxide and water from environment in the presence of sunlight and syntheise food material and release oxygen to the environment and this happens only in night.