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Q:

Select the correct statement about the uterine cycle.

A) During the secretory phase, estrogen levels are at their highest. B) During the proliferative phase, levels of progesterone rise as the follicle begins to produce more hormone.
C) If fertilization occurs, the corpus luteum is maintained by a hormone secreted by the developing embryo. D) The menstrual phase of the cycle is from day 1 to day 8.
 
Answer & Explanation Answer: C) If fertilization occurs, the corpus luteum is maintained by a hormone secreted by the developing embryo.

Explanation:

"If fertilization occurs, the corpus luteum is maintained by a hormone secreted by the developing embryo." is the only correct statement about the uterine cycle among the options.

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Q:

Which can disrupt the cell cycle?

A) Mutation B) Replication
C) Both A & B D) None of the above
 
Answer & Explanation Answer: D) None of the above

Explanation:

Mutations can disrupt the cell cycle, and can cause certain diseases and conditions.

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Q:

Type 1 diabetes is more common than type 2 ?

A) TRUE B) FALSE
Answer & Explanation Answer: B) FALSE

Explanation:

Type 2 diabetes is the most common form of diabetes.


 



  • If you have type 1 diabetes your body does not release insulin.


 



  • If you have type 2 diabetes your body does not use insulin properly.

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Q:

Which statement correctly describes the role of chance in evolution?

A) An allele that increases evolutionary fitness cannot be lost from a population by chance events. B) The ultimate source of new alleles is mutation, random changes in the nucleotide sequences of an organism's DNA
C) Evolutionary change proceeds by an accumulation of changes that occur by chance. D) None of the above
 
Answer & Explanation Answer: B) The ultimate source of new alleles is mutation, random changes in the nucleotide sequences of an organism's DNA

Explanation:
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Q:

Which one of the following functions is not carried out by smooth endoplasmic reticulum?

A) Transport of materials B) Synthesis of lipid
C) Synthesis of protein D) Synthesis of steroid hormone
 
Answer & Explanation Answer: C) Synthesis of protein

Explanation:

Smooth Endoplasmic Reticulumdoes not contain ribosomes on its surface for which it is regarded as smooth. So, proteins cannotbe synthesised by SER provided protein synthesis is the primary task of ribosomes.

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Q:

Deep fried foods are carcinogenic because they are rich in

A) Nicotine B) Hydrocarbons
C) Fats D) All of the above
 
Answer & Explanation Answer: C) Fats

Explanation:

Deep fried foods are carcinogenic because they are rich in fats.

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Q:

Which of these best describes genetic drift?

A) Random fluctuations in the gene frequencies within a population Eliminate B) The combining of alleles to create more genetic variations within a population
C) The movement of alleles between population D) A planned method to reduce the number of inferior genes in a population
 
Answer & Explanation Answer: A) Random fluctuations in the gene frequencies within a population Eliminate

Explanation:

Random fluctuations in the gene frequencies within a population Eliminate is the one which best describes genetic drift.

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Q:

Which describes how mRNA is used by a cell?

A) It is used to move information to other cells. B) It is used to check DNA for mutations.
C) It is used to replicate DNA for mitosis. D) It is used to transfer genetic information.
 
Answer & Explanation Answer: D) It is used to transfer genetic information.

Explanation:

A RNA copy of a DNA gene is called as messenger RNA or mRNA. mRna is used in translation because information is translated from one language (nucleotides) into another (amino acids).

 

Hence, mRNA is used to transfer genetic information by a cell.

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